JP3681834B2 - Exercise load control device for exercise machine - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an exercise intensity measurement device that measures exercise intensity of a living body and an exercise load control device that adjusts the load of an exercise machine.
[0002]
[Prior art]
There are known exercise load devices such as an ergometer and a treadmill that apply a load to a living body by being mechanically operated in association with the movement of the living body. When exercise load is applied to a living body using such an exercise machine for exercise therapy or the like, exercise intensity determined by exercise prescription has been continued for a predetermined time. This exercise intensity is expressed, for example, by the product PRP (Pressure Rate Product) of the pulse rate and the maximum blood pressure value and the target value PRP._MIs determined and its target value PRP_MThe maintenance time is determined. The product PRP of the pulse rate and the maximum blood pressure value is also referred to as exercise load or work intensity. Compared to the case where the exercise intensity is represented by the pulse rate or blood pressure value alone, the exercise intensity of the living body can be accurately calculated. Can be represented. For this reason, in the conventional exercise load machine control device, the actual exercise intensity PRP of the living body is sequentially obtained, and the target exercise intensity PRP is obtained._MThe load of the exercise machine is controlled so that the actual exercise intensity PRP and the actual exercise intensity PRP coincide with each other, and this is continued for a predetermined maintenance time. For example, this is the device described in Japanese Patent Publication No. 7-47053.
[0003]
[Problems to be Solved by the Invention]
By the way, the exercise intensity PRP is calculated from the product of the systolic blood pressure value and the pulse rate. The systolic blood pressure value simply indicates the pressure value at the highest point of the blood pressure waveform, and the area of the pressure waveform. In other words, since it cannot accurately correspond to the blood delivery work amount, it is not necessarily a variable that accurately indicates the load of the living body, that is, the heart. For this reason, the exercise intensity PRP obtained from the maximum blood pressure value cannot indicate the exercise intensity of the living body with sufficient accuracy. Further, in order to increase the exercise efficiency of the living body, the target exercise intensity PRP_MIs often set to a size near the boundary between aerobic and anaerobic movements of a living body known as anaerobic work threshold value AT, for example. Exercise PRP_MWhen the load of the exercise machine is controlled so as to coincide with the above, there is a problem that the exercise efficiency of the living body cannot always be increased or an excessive burden is given to the living body.
[0004]
The present invention has been made against the background of the above circumstances, and the object of the present invention is high in the exercise intensity measuring device for measuring exercise intensity capable of accurately representing the exercise intensity of the living body and in the exercise of the living body. It is an object of the present invention to provide an exercise load control device for an exercise machine that is efficient and does not give an excessive burden to a living body.
[0007]
[To solve the problemofmeans】
  In addition, a book for achieving the above purposeinventionThe gist of the exercise load control apparatus of the present invention is to determine the exercise intensity of the living body sequentially in an exercise machine that is mechanically operated in relation to the movement of the living body, and the exercise intensity is the optimum movement during the movement period of the living body. An exercise load control device that adjusts the load of the exercise machine so as to match the intensity, wherein (a) an average blood pressure value determining unit that determines an average blood pressure value of the living body, and (b) a pulse rate of the living body (C) an exercise for calculating the exercise intensity as a product of the average blood pressure value of the living body determined by the average blood pressure value determining means and the pulse rate determined by the pulse rate determining means; Strength calculation means, (d ) Initial load increasing means for increasing the load applied to the living body in the initial section of the exercise period; (e) Target exercise intensity value determining means for determining a target exercise intensity value based on a breakpoint of the increase in exercise intensity that occurs as the load is increased by the initial load increasing means; (f) When the target exercise intensity value is determined by the target exercise intensity value determining means, the increase in the load by the initial load increasing means is stopped, and the exercise machine is configured so that the actual exercise intensity follows the target exercise intensity value. Exercise load adjusting means for adjusting the load;Is to include.
[0008]
[inventionEffect]
  In this way, the exercise intensity calculation means calculates the product of the average blood pressure value of the living body determined by the average blood pressure value determination means and the pulse rate determined by the pulse rate determination means as the exercise intensity value. The load of the exercise machine is adjusted so that the exercise intensity value becomes the optimum intensity. The average blood pressure value is, for example, a value obtained by dividing the integrated value of the blood pressure waveform per beat by the cycle of one beat, that is, the height of the center of gravity of the area of the blood pressure waveform, and the cardiac output and peripheral vascular resistance. Since this is a product, it corresponds relatively accurately to the amount of blood delivery work of the heart or the magnitude of the force of delivering blood into the blood vessel per beat. Therefore, an exercise intensity that accurately represents the exercise load of the living body can be obtained, and the load of the exercise machine is adjusted so that the exercise intensity becomes the optimum intensity. No burden on the living body.Furthermore, when the break point of the exercise intensity value calculated by the exercise intensity value calculation means is generated as the load applied to the living body is increased in the initial section of the exercise period of the organism by the initial load increasing means, The exercise intensity value determining means determines a target exercise intensity value based on the break point. Then, the exercise load adjusting means stops the increase in load by the initial load increasing means, and the load of the exercise machine is adjusted so that the actual exercise intensity follows the target exercise intensity value. Each time exercise is performed, the optimum target exercise intensity is determined without imposing a heavy burden on the living body, and the load on the exercise machine is controlled so that the target exercise intensity is given. In addition, since the load is not applied to each living body to the maximum in this way, the living body is not painful, and exercise therapy can be performed on a living body having a disease, and the living body exercises. The optimal load suitable for the physical condition of the day, that is, the initial stage of anaerobic exercise or exercise with the maximum intensity of aerobic exercise is given.
[0010]
Other aspects of the invention
  here,Preferably, the exercise load control device includes a break point determination means for determining a break point of the increase in the exercise intensity value as the load is increased by the initial load increase means, and the target exercise intensity value determination is performed. The means determines a target exercise intensity value lower than the exercise intensity value corresponding to the break point by subtracting a preset correction value from the exercise intensity value corresponding to the break point. The preset correction value may be a preset fixed value, but is preferably a value determined based on the age, sex, exercise ability, etc. of the living body from a predetermined relationship. . In this way, the target exercise intensity value is set to a value lower than the value corresponding to the break point of the increase in exercise intensity value, so compared with the case where the value corresponding to the break point is set as the target exercise intensity value. Thus, it is compensated that the target exercise intensity value becomes higher than the actual value due to the delay of the response of the living body, and the optimum target exercise intensity value is determined.
[0011]
Preferably, the exercise load control device is configured to apply exercise load to the living body based on the fact that an elapsed time after the exercise load is applied to the living body has reached a predetermined determination reference time. Exercise load for reducing the exercise load on the living body according to a preset reduction procedure when the end of the exercise load application to the living body is determined by the exercise load end determining means for determining the end and the exercise load end determining means And termination processing means. In this way, when it is determined by the exercise load end determination means that the exercise load has been applied to the living body, the exercise load on the living body is automatically set by the exercise load end processing means in accordance with a preset reduction procedure. Therefore, the inconvenience caused by the lack of cooling down is eliminated from the living body.
[0012]
Preferably, the initial load increasing means continuously increases the load on the living body at a predetermined speed. In this way, since the load applied to the living body in the initial period of the living body's exercise period is increased with the passage of time at a preset speed, compared to a case where the load is increased stepwise, There is an advantage that determination of a break point is easy because there is no stepwise increase in work intensity corresponding to a stepwise increase in load.
[0013]
Preferably, the initial load increasing means increases the load on the living body in a stepwise manner while repeatedly maintaining the value for a predetermined period after increasing the load with a predetermined increase width. In this way, since the break point is determined when the load on the living body is constant, there is an advantage that the delay in the labor intensity due to the reaction of the living body is reduced.
[0014]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram for explaining the configuration of an exercise load control device to which the present invention is applied, and includes a well-known ergometer 6 that functions as an exercise machine and a blood pressure monitoring device 8.
[0015]
The blood pressure monitoring device 8 includes a cuff 10 that has a rubber bag in a cloth band bag and is wound around, for example, a patient's upper arm 12, and a pressure sensor 14 that is connected to the cuff 10 via a pipe 20. A switching valve 16 and an air pump 18. The switching valve 16 has a pressure supply state that allows supply of pressure into the cuff 10, a slow discharge state that gradually discharges the inside of the cuff 10, and a quick discharge state that rapidly discharges the inside of the cuff 10. It is configured to be switched to one state.
[0016]
The pressure sensor 14 detects the pressure in the cuff 10 and supplies a pressure signal SP representing the pressure to the static pressure discrimination circuit 22 and the pulse wave discrimination circuit 24, respectively. The static pressure discriminating circuit 22 includes a low-pass filter, discriminates a cuff pressure signal SK representing a steady pressure, that is, a cuff pressure included in the pressure signal SP, and electronically controls the cuff pressure signal SK via an A / D converter 26. Supply to device 28.
[0017]
The pulse wave discrimination circuit 24 includes a band pass filter, and a pulse wave signal SM that is a vibration component of the pressure signal SP.₁ And the pulse wave signal SM₁ Is supplied to the electronic control unit 28 via the A / D converter 29. This pulse wave signal SM₁ The cuff pulse wave represented by is a pressure vibration wave generated from a brachial artery (not shown) and transmitted to the cuff 10 in synchronization with the heartbeat of the patient.
[0018]
The electronic control unit 28 includes a CPU 30, a ROM 32, a RAM 34, and a so-called microcomputer provided with an I / O port (not shown). The CPU 30 has a storage function of the RAM 34 according to a program stored in the ROM 32 in advance. By executing the signal processing while using it, a drive signal is output from the I / O port to control the switching valve 16 and the air pump 18, and the display content of the display 36 is controlled.
[0019]
As shown in detail in FIG. 2, the pressure pulse wave sensor 38 has a container-like open end of the housing 44 at the site downstream of the artery of the patient's upper arm 12 to which the cuff 10 is attached, for example, the wrist 40. Is attached to the wrist by the mounting band 42 so as to be detachable. In the pressure pulse wave sensor 38, a pressing member 50 fixed to the diaphragm 46 is provided inside the housing 44 so as to be relatively movable and projectable from the open end of the housing 44. The housing 44, the diaphragm 46, and the like are provided. Thus, a pressure chamber 45 is formed. In the pressure chamber 45, pressure air is supplied from the air pump 56 via the pressure regulating valve 58, so that the pressing member 50 has a pressing force P corresponding to the pressure in the pressure chamber 45._HDIs pressed toward the radial artery 48 immediately below the epidermis 40.
[0020]
The pressing member 50 includes, for example, a plurality of semiconductor pressure sensitive elements (not shown) on the pressing surface 51 of a semiconductor chip made of single crystal silicon or the like at intervals of, for example, about 0.2 mm in a direction perpendicular to the radial artery 48. The pressure vibration wave, that is, the pressure pulse wave transmitted from the radial artery 48 through the epidermis 40 by being pressed toward the radial artery 48 immediately below the epidermis 40 of the wrist. Pressure pulse wave signal SM detected for each beat and representing the pressure pulse wave₂ Is supplied to the electronic control unit 28 via the A / D converter 52.
[0021]
Further, the CPU 30 of the electronic control device 28 outputs a drive signal to the air pump 56 and the pressure regulating valve 58 according to a program stored in advance in the ROM 32, so that the pressure in the pressure chamber 45, that is, the pressing force against the skin of the pressing member 50 is obtained. The optimum pressing value P at which a part of the tube wall of the radial artery 48 becomes flat_HDPAnd adjust to maintain that value. That is, when monitoring the continuous blood pressure of the living body, the optimum pressing force P of the pressing member 50 is based on the pressure pulse wave sequentially obtained in the pressure changing process in the pressure chamber 45._HDPAnd the optimum pressing force P of the pressing member 50 is determined._HDPThe pressure regulating valve 58 is controlled so as to maintain the above.
[0022]
The setting device 60 includes a keyboard, for example, and outputs setting values such as correction values and exercise periods input by manual operation to the electronic control device 28. In addition, the clock circuit 62 records the detection time of the pressure pulse wave, the blood pressure value, etc., or records the time at the start of the exercise period and determines the end of the exercise period, and sets the current time to the electronic control device 28. To output.
[0023]
The ergometer 6 is an exercise machine or exercise load device that is driven in association with the movement of a living body, and includes a pedal 64 that is rotationally driven by the living body, and an electromagnetic that is operatively connected to the pedal 64 via a chain 66. And a brake 68. For example, the electromagnetic brake 68 controls the rotational resistance by adjusting the magnitude of the eddy current generated in the rotating disk, or adjusts the magnitude of the generated current induced in the rotating coil. Or control. The electromagnetic brake 68 functions as exercise load adjusting means for changing the load applied to the living body during exercise by changing the operating state of the exercise mechanism.
[0024]
FIG. 3 is a functional block diagram for explaining a main part of the control function of the electronic control device 28 for controlling the exercise load device. In the figure, the cuff pressure control means 70 is a reference blood pressure measurement means that is activated prior to continuous blood pressure measurement, that is, prior to use of the ergometer 6, for example, for determination of the pressure pulse wave blood pressure correspondence shown in FIG. During the 72 measurement periods, the cuff 10 compression pressure is varied according to well-known measurement procedures. For example, the cuff pressure control means 70 rapidly increases the compression pressure of the cuff 10 to a pressure increase target value set in advance to about 180 mmHg, which is higher than the maximum blood pressure of the living body, and then 3 mmHg in the measurement interval in which the blood pressure determination algorithm is executed. The pressure is gently lowered at a speed of about / sec, and when the blood pressure measurement is completed, the compression pressure of the cuff 10 is released.
[0025]
The reference blood pressure measuring means 72 is a pressure vibration of the cuff 10 in the process of gradually reducing the pressure of the cuff 10 in the measurement section preceding the load increase by the initial load increasing means 84 and the exercise load control by the exercise load adjusting means 90. Based on the change in the magnitude of the cuff pulse wave generated as a maximal blood pressure value BP of the living body by a well-known oscillometric method_SYS, Mean blood pressure BP_MEAN, Minimum blood pressure BP_DIAAre measured and displayed on the display 36.
[0026]
When the blood pressure value is measured by the reference blood pressure measuring unit 72 prior to the load increase by the initial load increasing unit 84 and the exercise load control by the exercise load adjusting unit 90, the pressure pulse wave blood pressure correspondence determining unit 74 determines the pressure pulse wave. The magnitude P of the pressure pulse wave detected by the sensor 38_MLower peak value P of (t)_MminAnd upper peak value P_MmaxAnd the blood pressure value BP (maximum blood pressure value BP) measured by the reference blood pressure measuring means 72_SYS, Minimum blood pressure BP_DIA) Is determined in advance for a predetermined living body. This correspondence is shown in FIG. 4, for example, and EBP = α · P_M(t) It is shown by the formula + β. Where α is a constant indicating the slope, β is a constant indicating the intercept, and EBP is an estimated blood pressure value that is continuously determined.
[0027]
The estimated blood pressure value determining means 76 is a correspondence relationship EBP = f (P determined by the pressure pulse wave blood pressure correspondence determining means 74._M), The magnitude P of the pressure pulse wave sequentially detected by the pressure pulse wave sensor 38._M(t) based on the estimated blood pressure value EBP (maximum blood pressure value EBP_SYS, Minimum blood pressure EBP_DIA) Are sequentially determined, and the determined estimated blood pressure value EBP is continuously displayed on the display 36 as a trend. The cuff pressure control means 70, the reference blood pressure measuring means 72, the pressure pulse wave sensor 38, the pressure pulse wave blood pressure correspondence determining means 74, and the estimated blood pressure value determining means 76 synchronize the blood pressure value of the living body with the pulse without being invaded. It functions as continuous blood pressure measuring means 78 that continuously measures.
[0028]
The mean blood pressure value determining means 79 is a correspondence relationship EBP = f (P determined by the pressure pulse wave blood pressure correspondence determining means 74._M), The magnitude P of the pressure pulse wave sequentially detected by the pressure pulse wave sensor 38._MBased on (t), a continuous blood pressure waveform, that is, an estimated blood pressure waveform EBP (t) is calculated, and an average value of the estimated blood pressure waveform EBP (t) in one cycle, that is, the center of gravity of the area of the estimated blood pressure waveform EBP (t) is calculated. The average blood pressure value EBP of a living body from the size (height)_MEANTo decide.
[0029]
The pulse rate determining means 80 calculates the pulse rate PR (1 / min) of the living body based on the cycle of the pressure pulse wave output from the pressure pulse wave sensor 38, for example, so that it is continuously synchronized with the pulse cycle. Determine the pulse rate PR. The exercise intensity calculating means 82 includes the pulse rate PR calculated by the pulse rate determining means 80 and the average blood pressure value EBP determined by the average blood pressure determining means 79._MEANExercise intensity MPRP (= PR × EBP)_MEAN: Mean Presure Rate Product) is sequentially calculated in synchronization with the pulse period. The exercise intensity MPRP indicates the intensity of exercise of the living body, and may be referred to as exercise load, effort intensity, or effort load.
[0030]
The initial load increasing means 84 is, for example, t in FIG. 5 during the movement period of the living body using the ergometer 6.₀To t₂In the initial section shown in FIG. For example, the initial load increasing means 84 continuously increases the load on the living body at a predetermined speed. The continuous increase speed or stepwise increase speed of the load is set to the highest value within a range in which the determination accuracy of break points described later is maintained.
[0031]
The target exercise intensity value determining means 86 is a target exercise intensity value MPRP based on the breakpoint of the exercise intensity value MPRP of the living body that increases as the load increases by the initial load increasing means 84._MTo decide. For example, when the break point determination unit 88 determines the break point F of the increase in the exercise intensity MPRP of the living body accompanying the increase in the load by the initial load increase unit 84, the target exercise intensity value determination unit 86 determines the break point F. At the time of occurrence, that is, t in FIG.₁Exercise intensity MPRP corresponding to the time_FTarget exercise intensity value MPRP that is the same value or a predetermined value lower than that_MTo decide. Target exercise intensity value MPRP lower by a predetermined value_MIs determined, the target exercise intensity value determining means 86 corresponds to the above-described breakpoint F with a correction value ΔPRP set in advance based on the age, sex, exercise ability, etc. of the living body from the relationship obtained in advance, for example. Exercise intensity value MPRP_FBy subtracting from the target exercise intensity value MPRP_MTo decide. Alternatively, the target motion value determining unit 86 corresponds to the break point F with a value ΔPRP corresponding to a delay time from when a load is applied to the living body in the initial section until the blood pressure value or pulse rate of the living body changes. Exercise value MPRP_FBy subtracting from the target exercise intensity value MPRP_MTo decide.
[0032]
Here, the break point determination means 88 is a time point after the break point F is about several beats after the exercise intensity MPRP exceeds a value corresponding to the break point F, for example, several beats after that. T₂A time point several beats before the time point, for example, t in FIG.₁It is a quick decision that something happened at the time. For example, the break point determination means 88 is an exercise intensity MPRP that is sequentially calculated by the exercise intensity calculation means 82 during the load increase period by the initial load increase means 84._nThe regression line KL is obtained, and the exercise intensity MPRP exceeds a predetermined judgment reference range determined around the regression line KL, for example, + 10%._nThe break point F is determined by continuously detecting a predetermined number of preset values. For example, in the two-dimensional Cartesian coordinate system including the time axis and the exercise intensity value axis in FIG. 6, two or more consecutive exercise intensities MPRP exceeding the criterion range indicated by the broken line._{m + 1}, MPRP_{m + 2}Is detected, the exercise intensity MPRP_{m + 1}Or the exercise intensity MPRP one before that_mOccurrence time t_F2Or t_F1It is determined that a break point F has occurred at_F2Or t_F1Value F on regression line KL₂Or F₁Is determined as a break point F.
[0033]
In the exercise load adjusting means 90, a break point F of the increase in the exercise intensity MPRP of the living body accompanying the increase of the load is determined by the break point determination means 88 in the initial load increase section where the load is increased by the initial load increase means 84. Then, after the load increase by the initial load increasing means 84 is stopped, the target exercise intensity value MPRP determined by the target exercise intensity value determining means 86 is immediately followed._MThe load of the ergometer 6 is adjusted so that the actual exercise intensity MPRP follows, that is, matches. T in FIG.₂To t_ThreeThe section shows this state. The broken line in FIG. 5 indicates the increasing direction of the exercise intensity MPRP when the load of the initial load increasing means 84 is not stopped and the load is continuously increased.
[0034]
The exercise load end determination means 92 is an elapsed time T after the exercise load is applied to the living body._ELIs, for example, a judgment reference time T set in advance for exercising the living body according to the exercise prescription._SThe end of the application of the exercise load to the living body is determined based on the fact that it has reached. The exercise load end processing means 94 reduces the exercise load on the living body according to a preset reduction procedure when the end of the application of the exercise load to the living body is determined by the exercise load end determining means 92. In this mitigation procedure, the load is gradually reduced in a preset order or continuously reduced at a preset reduction rate. T in FIG._ThreeTo t_FourThe section shows this state.
[0035]
FIG. 7 is a flowchart for explaining a main part of the control operation of the electronic control device 28. In step S1 (hereinafter step is omitted) in the figure, it is determined whether or not the exercise load device has been activated by operating an operation button (not shown). If the determination in S1 is negative, the system waits, but if the determination is positive, the living body has started to exercise using the ergometer 6, and therefore in S2 corresponding to the initial load increasing means 84, FIG. 5 t₀To t₂As shown in the initial load increase section, the exercise load is increased at a predetermined speed.
[0036]
Next, in S3, after the pulse rate PR and the continuous blood pressure waveform EBP (t) of the living body are read, in S4 corresponding to the average blood pressure value determining means 79, the average of the continuous blood pressure waveform EBP (t) within one cycle T is obtained. The mean blood pressure value EBP of the living body by calculating the value (ΣEBP (t) / T)_MEANIs determined. Next, in S5 corresponding to the exercise intensity calculating means 82, the exercise intensity MPRP (= PR × EBP)_MEAN) Is calculated. This exercise intensity MPRP is used as an index of myocardial load and correlates with oxygen consumption. Then, in S6 corresponding to the break point determination means 88, whether or not a break point F of the exercise intensity MPRP that is increased in the initial load increase section has occurred in the two-dimensional orthogonal coordinates composed of the time axis and the labor intensity value axis. Is judged.
[0037]
Since the determination in S6 is initially denied, the above S2 and subsequent steps are repeatedly executed. However, t in FIG.₂As shown at the time, when the occurrence of the break point F is determined in S6, S7 to S9 are executed, and the execution of S2 corresponding to the initial load increasing means 84 is stopped. First, in S7 corresponding to the target exercise intensity value determining means 86, the break point F is generated, that is, t in FIG.₁Exercise intensity MPRP corresponding to the time_FThe target exercise intensity value MPRP lower by a predetermined value ΔPRP than_MTo decide. Next, in S8, the elapsed time T_ELCT for counting_ELCounting is allowed. Then, in S9 corresponding to the exercise load adjusting means 90, for example, an exercise load adjustment routine shown in FIG._MThe load on the ergometer 6 is adjusted so that the actual exercise intensity MPRP matches. T in FIG.₂The time point indicates this state.
[0038]
In FIG. 8, in SB1 corresponding to the mean blood pressure value determining means 79, the estimated blood pressure waveform EBP (t) is read, and the average of the estimated blood pressure waveform EBP (t) within one cycle is calculated, whereby the average blood pressure value is calculated. EBP_MEANIs determined, and in SB2 corresponding to the pulse rate determining means 80, the pulse rate PR determined for each beat is calculated. Next, in SB3 corresponding to the exercise intensity calculating means 82, the average blood pressure value EBP_MEANAnd the actual exercise intensity MPRP (= PR × EBP based on the pulse rate PR_MEAN) Is calculated. Next, at SB4, the target exercise intensity value MPRP determined at S7._MIs read. In SB5 to SB8, the actual exercise intensity MPRP is changed to the target exercise intensity value MPRP._M, The electromagnetic brake 68 of the ergometer 6 is controlled. That is, in SB5, the actual exercise intensity MPRP is changed to the target exercise intensity value MPRP._MIt is determined whether or not If the determination of SB5 is negative, the actual exercise intensity MPRP is still the target exercise intensity value MPRP._MIn step SB6, it is increased by adding a predetermined change value ΔW to the work (consumed kinetic energy) W of the electromagnetic brake 68 in the previous cycle, but the determination in SB5 is affirmed. If the actual exercise intensity MPRP is the target exercise intensity value MPRP_MIn step SB7, the value is reduced by subtracting the predetermined change value ΔW from the work W of the electromagnetic brake 68 in the previous cycle. In SB 8, the exciting current of the exciting coil, that is, the braking torque of the electromagnetic brake 68 is adjusted so that the work W changed as described above is performed by the electromagnetic brake 68.
[0039]
Subsequently, in SB9, a biological abnormality is determined. For example, it is determined whether or not the pulse rate PR calculated by the pulse rate determining means 80 exceeds a preset criterion value. If the determination at SB9 is affirmative, an abnormality display indicating an abnormality of the living body is performed on the display 36 at SB10, and the work W of the electromagnetic brake 68, that is, the rotational resistance of the ergometer 6 is set to zero at SB11. And the routine of FIG. 7 is terminated. However, if the determination at SB9 is negative, this routine is terminated and S10 and subsequent steps in FIG. 7 are executed.
[0040]
Returning to FIG. 7, in S10 corresponding to the exercise load end determination means 92, the elapsed time T_ELIs, for example, a judgment reference time T set in advance for exercising the living body according to the exercise prescription._SIt is determined whether or not Initially, the determination in S10 is negative, so in S11 the counter CT_ELCounting contents T_EL"1" is added to the count content T_ELIs updated, the above S9 and subsequent steps are repeatedly executed. However, if the determination in S9 is affirmed, in S12 corresponding to the exercise load end processing means 94, exercise load end processing, that is, cooling down is executed, and the load applied to the living body is reduced by a predetermined reduction procedure. Is done. T in FIG._ThreeTo t_FourThe section shows this state.
[0041]
As described above, according to this embodiment, the average blood pressure value EBP of the living body determined by the average blood pressure value determining means 79 (S4, SB1) by the exercise intensity calculating means 82 (S5, SB3)._MEANAnd the pulse rate PR determined by the pulse rate determining means 80 (S3, SB2) is the exercise intensity value MPRP (= EBP_MEANXPR). This mean blood pressure value EBP_MEANIs, for example, the value obtained by dividing the integrated value of the blood pressure waveform per beat by the cycle of one beat, that is, the height of the center of gravity of the area of the blood pressure waveform. Therefore, an exercise intensity value MPRP that accurately represents the exercise load of the living body is measured.
[0042]
Further, in the exercise load control device of the present embodiment, the exercise intensity MPRP is the target exercise intensity value MPRP that is the optimum intensity._MBy adjusting the load of the ergometer 6 so as to become high efficiency with respect to the movement of the living body is obtained, and at the same time, an excessive burden is not given to the living body.
[0043]
Further, in the exercise load control device of the present embodiment, the exercise intensity calculation means 82 (S5) as the load applied to the living body increases in the initial section of the exercise period of the living body by the initial load raising means 84 (S2). When the break point F for increasing the exercise intensity MPRP calculated by the above is generated, the target exercise intensity value MPRP is determined based on the break point F by the target exercise intensity value determining means 86 (S7)._MIs determined. Then, the exercise load adjusting means 90 (S9) stops the load increase by the initial load increasing means 84, and the target exercise intensity value MPRP is stopped._MSince the load of the ergometer 6 is adjusted so that the actual exercise intensity MPRP follows, the optimal target load is determined without imposing much burden on the living body every time the movement of the living body is executed, and the target load is given. As a result, the load of the exercise load device is controlled. In addition, since the load is not applied to each living body to the maximum in this way, the living body is not painful, and exercise therapy can be performed on a living body having a disease, and the living body exercises. The optimal load suitable for the physical condition of the day, that is, the initial stage of anaerobic exercise or the exercise with the maximum intensity of aerobic exercise is given.
[0044]
Further, the exercise load control device of the present embodiment includes a break point determination means 88 (S6) for determining a break point F of the increase in exercise intensity MPRP accompanying the increase in load by the initial load increase means 84 (S2). The target exercise intensity value determining means 86 (S7) uses the preset correction value ΔPRP as the exercise intensity MPRP corresponding to the break point F._FBy subtracting from the effort strength value PRP corresponding to the break point F_FLower target exercise intensity value MPRP_MIs to determine. The preset correction value ΔPRP may be a preset constant value, but is preferably determined based on the age, sex, exercise ability, etc. of the living body from a predetermined relationship. Value. Therefore, the target exercise intensity value MPRP_MIs the value MPRP corresponding to the break point F of the exercise intensity value MPRP_FThe value MPRP corresponding to the break point F is set to a lower value than_FThe target exercise intensity value MPRP_MAs compared with the case of the above, it is compensated that the target effort intensity value becomes higher than the actual value due to the delay of the response of the living body, and the optimum target effort intensity value is determined.
[0045]
In addition, the exercise load control device according to the present embodiment has an elapsed time T after the exercise load is applied to the living body._ELIs a preset reference time T_SThe end of the application of the exercise load to the living body is determined by the exercise load end determination means 92 (S10) for determining the end of the application of the exercise load to the living body based on the fact that Then, exercise load end processing means 94 (S12) for reducing the exercise load on the living body by a preset reduction procedure is included. For this reason, when it is determined by the exercise load end determination means 92 that the exercise load has been applied to the living body, the exercise load end processing means 94 automatically sets the exercise load on the living body according to a preset reduction procedure. Since it is reduced, the occurrence of inconvenience in the living body due to insufficient cooling down is eliminated.
[0046]
Further, since the initial load increasing means 84 of the present embodiment continuously increases the load on the living body at a predetermined speed, the load to be applied to the living body is preset in the initial section of the living body's exercise period. As the time is increased over time, there is no gradual increase in the work intensity corresponding to the gradual increase in load compared to the case where the gradual increase is made, making it easier to determine break points. There is an advantage to become.
[0047]
As mentioned above, although one Example of this invention was described based on drawing, this invention is applied also in another aspect.
[0048]
For example, the target exercise intensity value determining means 86 of the above-described embodiment is the exercise intensity MPRP corresponding to the break point F._FAnd exercise intensity determined by other methods, for example, exercise intensity MPRP determined when sympathetic activity exceeds the parasympathetic nerve_NBased on the average value, and the target exercise intensity value MPRP_MMay be determined.
[0049]
In addition, the mean blood pressure value determining means 79 of the above-described embodiment calculates the mean blood pressure value EBP of the living body from the continuous blood pressure waveform EBP (t)._MEANFor example, the cuff pressure when the pulse wave obtained from the cuff 10 has the maximum amplitude may be determined as the average blood pressure value.
[0050]
Further, in the above-described embodiment, the initial load raising means 84 does not continuously increase the load on the living body at a predetermined speed, but maintains the value for a predetermined period after increasing the predetermined load. It may be one that raises step by step. In this way, since the break point is determined when the load on the living body is constant, there is an advantage that the delay in the labor intensity due to the reaction of the living body is reduced.
[0051]
In the above-described embodiment, the pulse rate PR and the average blood pressure value EBP_MEANIs determined every beat, and the exercise intensity MPRP is also calculated for each beat. However, the exercise intensity MPRP may not be necessarily calculated every beat, and the exercise intensity MPRP may be calculated every few beats. .
[0052]
In addition, the elapsed time T of the above-described embodiment_ELIs the time t when the break point F is determined₂Is the elapsed time since the initial load rise interval t₁It may be the elapsed time from. In short, it may be an elapsed time since the exercise load is applied to the living body.
[0053]
Further, the pressure pulse wave blood pressure correspondence relationship of the above-described embodiment was a linear expression, but when the pressure pulse wave sensor 38 is not pressed so as to hold the arterial vessel wall flat, a second or higher order polynomial is expressed. May be used.
[0054]
The above-mentioned reference blood pressure measuring means 72 determines the reference blood pressure value based on the change in the cuff pulse wave in the process of gradually decreasing the cuff pressure, but the cuff pulse in the process of gradually increasing the pressure. A reference blood pressure value may be determined based on a change in the wave. The reference blood pressure measuring means 72 determines the blood pressure value based on the change state of the magnitude of the pressure pulse wave that changes with the compression pressure of the cuff 10 according to the so-called oscillometric method. The blood pressure value of the living body may be measured based on the generation and disappearance of the Korotkoff sound generated from the ten compression parts. The reference blood pressure measurement means 72 does not use the cuff 10 such as a blood pressure measurement device based on a direct method, a device that detects a pulse wave using an ultrasonic Doppler, and measures a blood pressure based on a change in the pulse wave. It may measure blood pressure.
[0055]
In the above-described embodiment, the ergometer 6 is used as the exercise machine. However, for example, a treadmill 100 as shown in FIG. 9 may be used instead. In the treadmill 100, an endless belt 104 provided on a base 102 is rotationally driven by an electric motor 106, and a living body located on the endless belt 104 is caused to travel, so that an exercise load is applied. It is like that. For example, the electric motor 106 can change the load of the traveling motion of the living body by changing the rotation speed in accordance with a command from the electronic control unit 28.
[0056]
In addition, the present invention can be variously modified without departing from the gist of the present invention.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an exercise load control device according to an embodiment of the present invention.
FIG. 2 is a diagram for explaining in detail the pressure pulse wave sensor and the pressing force control device of the embodiment of FIG. 1;
FIG. 3 is a functional block diagram illustrating a main part of a control function of the electronic control device in the embodiment of FIG. 1;
4 is a diagram illustrating a correspondence relationship determined by a pressure pulse wave blood pressure correspondence relationship determining unit in FIG. 3; FIG.
FIG. 5 is a time chart showing an exercise load controlled by the electronic control unit in the embodiment of FIG. 1;
6 is a diagram for explaining a break point determination method by a break point determination unit in FIG. 3; FIG.
FIG. 7 is a flowchart for explaining a main part of the control operation of the electronic control device in the embodiment of FIG. 1;
FIG. 8 is a flowchart illustrating in detail the exercise load feedback control in step S8 of FIG.
FIG. 9 is a diagram illustrating a treadmill that is an exercise load device according to another embodiment of the present invention.
[Explanation of symbols]
6: Ergometer (exercise machine)
79: Mean blood pressure value determining means
80: Pulse rate determination means
82: Exercise intensity calculation means
84: Initial load increase means
86: Target exercise intensity value determining means
88: Break point judging means
90: Exercise load adjusting means
92: Exercise load end determination means
94: Exercise load end processing means
100: Treadmill (exercise machine)

Claims (3)

In an exercise machine that is mechanically actuated in relation to the movement of a living body, the exercise intensity of the living body is sequentially determined and the movement intensity of the exercise machine matches the optimum exercise intensity during the movement period of the living body. An exercise load control device for adjusting
Mean blood pressure value determining means for determining an average blood pressure value of the living body;
A pulse rate determining means for determining the pulse rate of the living body;
An exercise intensity calculating means for calculating a product of the average blood pressure value of the living body determined by the average blood pressure value determining means and the pulse rate determined by the pulse rate determining means as the exercise intensity, and an initial interval of the exercise period Initial load increasing means for increasing the load applied to the living body;
Target exercise intensity value determining means for determining a target exercise intensity value based on a breakpoint of the increase in exercise intensity that occurs as the load is increased by the initial load increasing means;
When the target exercise intensity value is determined by the target exercise intensity value determining means, the increase in the load by the initial load increasing means is stopped, and the exercise machine is configured so that the actual exercise intensity follows the target exercise intensity value. An exercise load control device for an exercise machine, comprising: an exercise load adjustment means for adjusting a load. And a break point determination unit that determines a break point of an increase in exercise intensity that occurs as the load is increased by the initial load increase unit, wherein the target exercise intensity value determination unit includes a preset correction value as a break point. corresponding to the subtracting from the exercise intensity value, kinematic machine exercise load control device of claim 1 in which determining a lower target exercise intensity value than the exercise intensity value corresponding to該折point. Exercise load end determination means for determining the end of the application of exercise load to the living body based on the fact that an elapsed time since the exercise load was applied to the living body has reached a preset determination reference time; and the exercise load When the end of the application of the exercise load to the living body is determined by the termination determination means, it is intended to include the exercise termination processing means to reduce the exercise load for biological at a preset relief procedure according to claim 1 exercise machine Exercise load control device.

Images