JPH0663200A - Golf trainer - Google Patents

Abstract

PURPOSE:To know how the positions of right and left feet of a person to be tested are located with respect to ideal stance positions, by obtaining respectively ideal positions of the right and left feet of the person to be tested corresponding to a golf ball in accordance with physical data and hitting tool data, and by displaying, on a display means, thus obtained respective ideal positions of the right and left feet of the person on a swing bed. CONSTITUTION:A processing unit 3 sets up an ideal position concerning the load centers of the right and left feet of a person to be tested upon address corresponding to a height and a kind of a used club inputted through a control panel, and displays the ideal load centers on a graphic display device 4a. Further, the processing unit 3 receives data from load cells 12 to 15 and 16 to 19 so as to obtain the load and load center of the person to be tested and the load centers respectively corresponding to the right and left feet thereof, which are then displayed on the graphic display device 4a. Accordingly, the respective load centers of the right and left feet of the person to be tested can be shifted so as to be aligned with ideal positions, thereby it is possible to perform effective training.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a mounting portion for mounting a ball for hitting a ball, a swing table on which a test subject who holds a ball hitting ball and hits a ball, and a load center of each of the left and right feet of the test subject. In a state in which the load measuring means to measure and the measurement result of the load measuring means are associated with the position with respect to the swing table,
The present invention relates to a golf training machine provided with control means for displaying on a display means.

[0002]

2. Description of the Related Art Conventionally, in such a golf practice machine, a subject holds a club in front of his / her body so that the head of a hitting tool (hereinafter also referred to as a club) is located beside the ball.
For example, if the club is a short iron, the stance width is narrowed, and if the club is a long iron, the stance width is widened.

[0003]

When a subject is practicing a swing, where the ideal stance position with respect to the ball position is on the swing table, and the left and right foot positions of the subject are the ideal stance. It is known that knowing what kind of position it is with respect to the position is an important point in improving the swing. However, in the above-mentioned conventional example, although it is possible to know the positions of the left and right feet with respect to the swing table, where is the ideal stance position with respect to the position of the ball on the swing table, and the positions of the left and right feet of the subject. I couldn't know what the position was in relation to the ideal stance position. That is, the subject
Even if you try to match your left and right feet to the ideal stance position,
There was the problem of not knowing where the ideal stance position was. As a method of solving this problem, it is considered that a mark such as a foot is displayed at an ideal stance position on the swing table and the stance is taken in accordance with the mark. However, with this method, it was necessary to change the display position of the ideal stance depending on the physical constitution of the subject or the type of club. The present invention has been made in view of the above circumstances, and the purpose thereof is to effectively practice by knowing what position each of the left and right feet of the subject is with respect to the ideal stance position. To provide a golf training machine.

[0004]

A golf training machine according to the present invention has a placing portion for placing a ball for hitting a ball, a swing table for holding a subject who holds a hitting tool and makes a hitting motion, and a left and right side of the subject. A load measuring means for measuring the load center of each foot, and a control means for displaying the measurement result of the load measuring means on the display means in a state where the position with respect to the swing table is associated, The characteristic configuration is provided with a physique information input means for inputting the physique information of the subject and a hitting tool information input means for inputting the information of the hitting tool, and the control means is input by the physique information inputting means. Based on the physique information and the hitting tool information input by the hitting tool information input means, the ideal position of each of the left and right feet on the swing table corresponding to the ball is obtained, and the obtained left and right on the swing table are obtained. Each foot The position of the ideal, while associating the position relative to the swing table, in that it is configured so as to be displayed on the display means.

[0005]

According to the characterizing feature of the present invention, the load centers of the left and right feet of the subject are displayed on the display means in a state of being associated with the positions on the swing table, and are obtained from the physique information and the hitting tool information of the subject. Further, the ideal position of each of the left and right feet on the swing table is displayed on the display means in a state where the positions on the swing table are associated with each other.

[0006]

According to the characteristic configuration of the present invention, the subject is
You can know the position of the load center of each of your left and right feet on the swing table and the ideal position of each of your left and right feet corresponding to your physique and the type of hitting tool. It is also possible to move the position of the load center to match this ideal position. Therefore, it is possible to provide a golf training machine that enables effective training by knowing the positions of the left and right feet of the subject with respect to this ideal stance position.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a golf training machine to which the present invention is applied will be described below with reference to the drawings. 1, 2 and 3, 1 is a swing table, 2 is a tea stand, 3 is a processing device, and 4 is a display device as a display means. In the golf practice machine of the present embodiment, during the swing, the processing device 3 processes the detection data of the load detection sensor D provided on the swing base 1 to display the load center on the display device in real time.
It is stored once as time series data of load or load center and displayed after the swing is completed. Hereinafter, each device will be described.

The swing base 1 comprises two load detection bases 10 and 11 corresponding to the left and right feet respectively.
Is the four load cells 12, 1 as the load detection sensor D
The four corners are supported by 3, 14, and 15, and the load detection base 11 is supported by the four load cells 16, 17, 18, and 19 as the load detection sensor D at the four corners. On the swing table 1, the subject holding the club C swings. At this time, the load applied to the swing base 1 is the eight load cells 12, 13, 14, 15, 16, 17, 18, 1 supporting the two load detection bases 10, 11.
The load and the load center of the subject and the load centers corresponding to the left and right feet of the subject are obtained from these outputs as will be described later.

A mounting tool 25 for mounting a ball 24 is mounted on the tea stand 2. Then, the ball 24 is placed on the other side across the club head passage where the ball 24 is set.
When the ball 24 is placed on the mounting tool 25 by detecting the presence or absence of the ball, it functions as a reset switch when starting a new swing, and the ball 24 on the mounting tool 25 is hit by the club C. A sphere detection sensor 21 is provided which detects, as an impact point, a time point when the player leans down and disappears from the mounting tool 25. A club detection sensor 22 that detects the movement of the club C to the backswing side is provided at the club head passing position on the backswing side. Both the ball detection sensor 21 and the club detection sensor 22 are configured by a reflection type optical sensor. The control box 26 has a built-in drive circuit for the ball detection sensor 21 and the club detection sensor 22. On the backswing side of the mounting tool 25, a head passing state detection sensor 70 composed of six reflective optical sensors for detecting the head speed and the face angle of the club head immediately before the impact point is provided on the tee stand. It is embedded in the upper surface of 2 with the detection surface side exposed. The output of the head passing state detection sensor 70 is transmitted to the analyzer 71, and based on the time difference for detecting the passing of the club head between the reflection type optical sensors constituting the head passing state detecting sensor 70, etc. Calculate the head speed and face angle of the club head. The calculation result is sent to the processing device 3. It should be noted that 0.2 seconds after the impact point detected by the ball detection sensor 21 is detected as the finish point at which the swing ends.

The processing unit 3 includes an arithmetic unit 31 for performing arithmetic processing for obtaining a load and a load center and sequence control of the apparatus, an I / O interface 32 for passing various data, and load and load center measurement information. It comprises a storage device 33 for storing, an operation console 34 for inputting the height of the subject and the type of club and various comments, an external storage device 35 for storing measurement information and the like. The display device 4 includes a graphic display device 4a and a plotter 4b. The graphic display device 4a displays a movement locus of the load center and the plotter 4b displays a time change of the load.

Next, the process of calculating the load and the load center by the arithmetic unit 31 functioning as the load measuring means M will be described. The test subject who holds the club C stands in a substantially center position on the swing table 1 while standing with the left and right feet on the two load detection tables 10 and 11, respectively. Explaining the load detection table 10 on which the subject places his left foot as an example, the load cells 12, 13, 14, at the four corners of the load detection table 10,
With respect to the output of 15, the stand load is canceled in advance by zero adjustment in the load converter 100, so that the total WL of the outputs W1, W2, W3, and W4 of the test subject on the load detection table 10 is obtained. The load on the left foot. That is, WL = W1 + W2 + W3 + W4 Further, at this time, the position where the load is applied and the four load cells 1
Since the shared output of each load cell differs depending on the relationship with the installation positions of 2 to 15, the load center of the load applied to the load detection base 10 can be obtained from these outputs. That is, the load component 12 in the left-right direction and the front-rear direction component Y expressed with the load cell 12 in FIG. 1 as the origin is a rectangle in which the four load cells 12 to 15 have a width a in the X direction and a width b in the Y direction. In the case where they are arranged at the four corners of the load detection base 10 of No. 3, it can be obtained from X = (W2 + W3) × a / WL Y = (W3 + W4) × b / WL. In addition, the load cells 12, 13,
Even when the arrangements of 14 and 15 are not at the four corners of the rectangle, the load center can be obtained by performing the correction unique to the geometrical arrangement of the load cells. If three or more load cells are arranged, the center of the load applied to the swing table 1 can be obtained. The load detection table 11 on which the subject places his right foot is also configured the same as the load measuring device 10,
Similarly to the above, the load center of the load applied to the load detection base 11 can be obtained. That is, the load centers corresponding to the left and right feet of the subject can be obtained.

As for the load and center of load of both legs of the subject, that is, the whole body, the load applied to the load detection table 11 is W.
If it is R, as in the case of the left foot above, the load cell 16
From the outputs W5 to W8 of ~ 19, WR = W5 + W6 + W7 + W8, the load WT of the whole body is obtained by WT = WL + WR, and the load center is the distance between the load center corresponding to the left foot and the load center corresponding to the right foot of the subject. If it is L, it is located at a position WR × L / WT away from the load center corresponding to the left foot on the line segment connecting the left and right load centers, and this can be calculated.

As shown in FIG. 3, eight load cells 12 ...
Outputs W1 to W4 and W5 to W8 of 15 and 16 to 19
Is a load converter 100 equipped with a measurement bridge circuit, a signal amplifier circuit, and an A / D converter, and after compensating for the weight of the swing table 1 as described above, it is sampled at regular intervals to become a digital quantity. Then, it is sequentially loaded into the processing device 3 via the I / O interface 32. The load WT of the subject, the load center, and the load centers corresponding to the left and right feet are calculated by the arithmetic unit 31 in the processing device 3 according to the above-described formula. Then, the obtained load center corresponding to each of the left and right feet of the subject and the load center corresponding to the entire body of the subject are displayed in real time on the graphic display device 4a of the display device 4, and the time series data of the load, The time series data of the load center corresponding to each of the left and right feet of the subject and the load center corresponding to the entire body of the subject, that is, the movement trajectory, is stored in the storage device 33. The time-series data is stored in such a manner that the sphere detection sensor 21 detects that the sphere 24 is placed on the mounting tool 25 and resets the apparatus, and the sphere detection sensor 21 then stores the sphere on the mounting tool 25. The data up to the impact point that detects when 24 is hit and disappears,
The oldest data is stored endlessly in the storage area of the storage device 33 having an appropriate storage capacity by sequentially rewriting the oldest data into the newest data, and the data after the impact point has a storage capacity corresponding to a predetermined time width. It is designed to be stored in another storage area. Together with these time-series data, the load center corresponding to each of the left and right feet of the subject at the time of addressing, the load center corresponding to the entire body of the subject, the load center corresponding to the entire body at the body turn start point, the entire body at the top position The load center corresponding to, the load center corresponding to the whole body at the swing-down point,
The load center corresponding to the entire body at the impact point and the load center corresponding to the entire body at the finish point are also stored in the storage device 33. Each load center at the time of addressing is obtained by averaging the positions of the load centers before the swing start point detected as described later.

Next, the process of obtaining the ideal stance position of the subject on the swing table 1 by the processing device 3 and displaying it on the display device 4 will be described with reference to FIG. In the figure, 101 is a ball hitting direction line at the load center 102 of the left foot (foot on the ball hitting side) of the subject, P is the distance between the ball 24 and this line 101, Q is the stance width of the left and right feet of the subject, and 103 is medium. -The load center of the right foot (foot on the backswing side) of the subject in the iron. Then, the load center 103 of the right foot of the subject in the medium iron is
It is set on the line 101, and the load center of the right foot of the subject when using other clubs is set so as to move on the line 104 passing through the load center 103 and having a predetermined inclination as shown in the figure. . In other words, the driver's stance is set as a closed stance, the medium iron's stance as a square stance, and the wedge stance as an open stance. Furthermore, the values of the stance width Q and the distance P are set in advance according to the height value as the physical constitution information of the subject and the type of club used as the hitting tool information. That is, the stance width Q and the distance P when using the driver are set to be wider as the height is higher corresponding to the input height value, and the stance width Q and the distance P when using other clubs are The length of the club is shortened at a predetermined rate as the length of the club is shortened such as driver → medium iron → wedge. Then, the width R of the setting ratio (about 12%) of the stance width in the driver obtained as described above is obtained, and the point 1 on the line R on the line 101 from the load center 102 of the left foot on the backswing side.
Call for 05. Then, the ideal position of the load center of each of the left and right feet is determined so that the ball 24 is located in front of this point 105. That is, if the height R is the same,
It is set so that it does not change even if the club used is different. The height value of the subject and the type of club used are configured to be input on the console 34.
Then, the processing device 3 is configured to display the ideal stance positions of the left and right feet on the swing table obtained as described above on the display device 4 in a state where the positions on the swing table 1 are associated with each other. Therefore, the load centers of the left and right feet of the subject are displayed on the display device 4 so as to overlap with the display of the ideal stance position. It is possible to know what the position is, and also to adjust the load center position of each of the left and right feet to this ideal stance position while looking at the display device 4.

Next, a process in which the club detection sensor 22 and the arithmetic unit 31 detect the swing start point of the subject will be described. In the storage device 33, information on whether or not the club detection sensor 22 has detected the passage of the club head is stored in time series in addition to the above-described data on the load and the load center. Based on this stored information, the arithmetic unit 31 excludes the time of about 100 mS immediately before the impact point and sets the time when the first club detection sensor 22 detects the passage of the club head as the swing start point by tracing back the time from the impact point. To detect.

Next, the process in which the arithmetic unit 31 detects the body turn start point will be described. Of the load and load center data obtained by the computing device 31 as described above and stored in the storage device 33, the time change of the load of the foot on the lower hand side in the backswing direction of the subject shown in FIG. 5, that is, the present embodiment. Since the device configuration for a right-handed subject is illustrated by way of example, when the load on the right foot changes with time, the search starts from the data corresponding to the swing start point indicated by point A in FIG. The position of B on the time axis is detected as the body turn start point.

Next, the process in which the arithmetic unit 31 detects the top position will be described. The component in the left-right direction, that is, the X direction, of the load-series time series data corresponding to the entire body of the subject, which is obtained by the arithmetic unit 31 as described above and stored in the storage device 33, is time-differentiated to obtain the load-center X-value. The time change of the moving speed in the direction is calculated. The above X illustrated in FIG.
In the temporal change of the moving speed in the direction, a point F, which is a predetermined time backward from the data of the impact point detected by the sphere detection sensor 21 indicated by point E in FIG. The data is searched in the direction of going back, and the sign of the moving speed in the X direction first reverses from negative to positive, that is, the direction G of the moving speed in the X direction first reverses.
Is detected as the top position. The time interval from the point E indicating the impact point to the point F, which is the reference time point, is set as a top position because the direction of the moving speed may be in the backswing direction immediately before the impact point. This time interval is 200m to prevent detection
S is suitable.

Next, a process in which the arithmetic unit 31 detects the swing-down point will be described. Of the data stored in the storage device 33 obtained by the arithmetic device 31 as described above,
In the time change 90 of the right foot load and the time change 91 of the left foot load shown in FIG. 7, a downswing is made from a point H indicating the top position obtained as described above to a point I indicating the impact point detected by the ball detection sensor 21. Equivalent to. During this downswing, from the point J indicating the time point when the load of the left and right feet of the subject becomes equal, t is on the side where time elapses and t ′ is on the side that goes back time, and the foot on the upper side in the downswing direction The rate of change of the load on the right foot, that is, the time differential value is calculated. It is suitable that both the time widths t and t'are about 50 mS. The point K indicating the time point when the absolute value of the change rate of the time change 90 of the right foot load becomes the minimum value is detected as the swing-down point.

As described above, the processing device 3 causes the display device 4 to display the ideal position of the load center of each of the left and right feet on the swing table and the measurement result of the load measuring device M on the display device 4.
Function as.

Next, the operation of this device in use will be described with reference to the flowchart of FIG. 8 and the display examples of FIGS. 9 to 11. In the flowchart of FIG. 8, after the power switch (not shown) is turned on to activate the device, the operator sets the operation mode of the device from the console 34 (step # 1). The operation modes include an ideal stance display mode and an ideal stance non-display mode. In the ideal stance display mode, the ideal position of the load center of each of the left and right feet of the subject obtained as described above is displayed on the graphic display device 4a, and in the ideal stance non-display mode, the ideal position is not displayed and the swing is performed. Only display data related to is displayed.

When the setting of the operation mode for selecting one of these two modes and the input of the height value of the subject and the type of club used are completed, the operation mode is changed to the ideal stance display mode in step # 2. Judge whether it is set or not. If the operation mode is set to the ideal stance non-display mode, the process proceeds to step # 5 without doing anything. If the operation mode is set to the ideal stance display mode, the height value input on the console 34 and the type of club used. The ideal positions of the load centers of the left and right feet of the subject at the addresses corresponding to and are set as described above (step #
3). When the setting is completed, the set ideal load centers 41 of the left and right feet are displayed on the graphic display device 4a (step # 4), and the process proceeds to step # 5.

In step # 5, the ball detection sensor 21
It is determined whether or not the ball 24 is placed on the mounting tool 25 based on the detection information of 1. and if the ball 24 is not on the mounting tool 25, the center of the load and the left and right feet corresponding to the entire body, respectively. The load center and the like corresponding to are displayed in real time, and the process returns to step # 5. That is, the detection data of the load detection sensor D is fetched (step # 14), and as shown in the display example of FIG. 9, arithmetic processing is performed to determine the load center corresponding to the whole body and the load center corresponding to each of the left and right feet. Is calculated (step # 15) and displayed on the graphic display device 4a as the load center point 50 of the left and right feet and the load center point 51 of the whole body, and the ratio of the load of the left and right feet to the total load (that is, , WL / WT and WR / WT) are obtained, and displayed in the display columns 52 provided at the left and right ends of the display screen of the graphic display device 4a as ratio display points 53 so that the larger the ratio value is, the higher the ratio is. 16). In the display example of FIG. 9, the ideal stance display mode is selected in step # 1. After performing this screen control, it is determined whether or not the mode change switch of the console 34 is pressed (step # 17), and if pressed, the process returns to step # 1 to set the operation mode and the height value of the subject. , The club type can be changed, and if not pressed, the process returns to step # 5.

In step # 5, the ball 24 is placed on the mounting tool 2
When placed on 5, the device will be in a reset state, load data of a new swing will be collected, and the data will be calculated and the center of the load corresponding to the whole body and the left and right feet will be dealt with. The collected data is stored in the storage device 33 while displaying the load center and the like in real time. That is, the ideal stance position 41 for each of the left and right feet
The stored data and the display on the graphic display device 4a are left as they are, and the stored data corresponding to the previous swing and the display on the graphic display device 4a are cleared (step # 6). Then, the detection data of the load detection sensor D is taken in (step # 7), and the load and the load center of the whole body, the load center corresponding to each of the left and right feet, and the ratio of the load of each of the left and right feet to the total load. Is calculated by arithmetic processing and stored in the storage device 33, and the arithmetic result is calculated as the load center point 50 of the left and right feet and the load center point 5 of the entire body.
1 and percentage display point 53 as graphic display device 4a
(Steps # 8 and # 9).

After this screen control, it is judged whether or not the swing has already ended depending on whether or not a predetermined time has passed from the impact point (step # 10), and if the predetermined time has not passed, step # Return to position 7. When it is judged that the swing has already ended after a predetermined time has passed from the impact point, as shown in FIG. 10, the movement locus 55 of the load center of the whole body and the left and right feet of the completed swing are shown. Moving trajectory 5 of the corresponding load center
6, 57, individual address points 58 indicating load centers corresponding to the left and right feet of the subject at the time of address, address points 59 indicating load centers corresponding to the entire body of the subject at the time of address, and the subject at the body turn start point The load center corresponding to the whole body is the body turn start point 60, the load center corresponding to the whole body of the subject at the top position is the top point 61, and the load center corresponding to the whole body of the subject at the swing down point is the swing down point 62. Impact point 6 indicating the load center corresponding to the entire body of the subject at the impact point
3 and the finish point 64 indicating the load center corresponding to the whole body of the subject at the finish point, the ideal stance position 41 of each of the left and right feet which is already displayed
At the same time, it is displayed on the graphic display device 4a. An analyzer 71 is provided at the upper end of the display screen of the graphic display device 4a.
Address right foot load that indicates the ratio of the right foot load to the overall load at the head speed, face angle, face orientation (indication of whether the face is open, closed, or flat) immediately before the impact point detected at Display the ratio. Similar to FIG. 9, FIG. 10 also shows a display example when the ideal stance display mode is selected. Further, as shown in FIG. 11, the data of the time change of the load corresponding to the whole body is plotted on the plotter 4b.
(Step # 11). In the display of the time change of the load corresponding to the whole body, the swing start point display 80, the body turn start point display 81, the top position display 82, the swing-down point display 83, the impact point display 84,
Further, the finish point display 85 is displayed together with the mark 86 visually showing each state. The graphic display device 4a displays data from the swing start point to the finish point, and the plotter 4b displays data for a predetermined time before and after the impact point. After that, if the measured load and load center data are not saved, return to the position for detecting the presence or absence of the sphere 24, and if saved, transfer the measured data to the data saving area of the storage device 33 (step # 12). And # 13), and returns to the position of step # 5.

[Other Embodiments] Other embodiments will be listed below. In the above embodiment, the number of load detection bases is two, but
Two or more may be used, or a load detecting base for measuring the load and the center of the load of the whole body is separately provided, and the load detecting bases 10 and 1 are provided.
You may arrange | position in 1 and 2 steps | paragraphs.

In the above embodiment, the ideal load center position of each of the left and right feet is displayed on the display device 4 as the ideal stance display mode. The movement locus of the ideal load center of the whole body at the ideal load center position may be displayed together.

In the physique information input means of the above embodiment,
Although it is configured to input the height of the subject, the physique information such as the shoulder width and the weight of the subject may be input. Then, an ideal stance position corresponding to this physique information may be obtained.

The hitting tool information input means of the above embodiment is configured to input the type of club (driver, medium iron, wedge, etc.).
It is also possible to input ball hitting tool information such as club length. Then, an ideal stance position corresponding to the hitting ball information may be obtained.

In the ideal stance position of the above embodiment, the driver's stance is set to a closed stance, the medium iron stance is set to a square stance, and the wedge stance is set to an open stance, but all stances are set to square. You may set it to be a stance.

In the ideal stance position of the above embodiment, the positions of the balls in all the clubs are set in front of the point 105 on the inner side of the set distance R from the left foot (foot on the ball-hitting direction side). The position of the driver is closest to the front of the left foot, and as the club becomes shorter, it may be set closer to the front in the center of the body, or the position of the ball in front of the center of the stance width Q of each club. May come.

In the above embodiment, the plotter 4b displays the time change of the load of the whole body, but it may display the time change of the loads WL and WR corresponding to the left and right feet, respectively. The data indicating the change over time may be displayed on the graphic display device 4a.

In the above-described embodiment, each measurement information regarding the load and the load center is stored in the data storage area of the storage device 33. However, the measurement information is stored in the external storage device 35, and as necessary. It may be read out and displayed on the display device 4.

In the above embodiment, the swing base 1 and the tee stand 2 are shown for the right-handed subject, but the swing base 1 and the tee stand 2 for the left-handed subject can be replaced. good.

Incidentally, although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a plan view of a golf training machine to which the present invention is applied.

FIG. 2 is a side view of a golf training machine to which the present invention is applied.

FIG. 3 is a block diagram of a golf training machine to which the present invention is applied.

FIG. 4 is a diagram showing an ideal stance position.

FIG. 5 is a diagram showing detection of a body turn start point.

FIG. 6 is a diagram showing detection of a top position.

FIG. 7 is a diagram showing detection of a swing-down point.

FIG. 8 is a flowchart according to the embodiment.

FIG. 9: Display example of load center position of ideal stance

FIG. 10 is a display example of a movement trajectory of a load center.

FIG. 11: Display example of time change of load

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swing platform 4 Display means 24 Ball 25 Placement section C Club E Physical size information input means F Hitting tool information input means M Load measuring means U Control means

Claims (1)

[Claims] 1. A placing part (25) for placing a ball for hitting a ball (24), a swing table (1) for holding a hitting tool (C) and a subject who makes a hitting motion, and a left and right side of the subject. Control for displaying on the display means (4) the load measuring means (M) for measuring the load center of each foot and the measurement result of the load measuring means (M) in a state in which the position with respect to the swing table (1) is associated with each other. A golf practice machine provided with means (U), and is a physique information input means (E) for inputting physique information of a subject.
And a ball hitting tool information input means (F) for inputting information of the ball hitting tool (C), and the control means (U) stores the physique information input by the physique information input means (E). The ideal position of each of the left and right feet on the swing table (1) corresponding to the ball (24) is obtained based on the hitting tool information input by the hitting tool information input means (F), and this is found. A golf practice machine configured to display the ideal position of each of the left and right feet on the swing table (1) on the display means (4) in a state where the positions on the swing table (1) are associated with each other.