LU500401B1

LU500401B1 - Indirect evaluation method of college students' cardiorespiratory endurance based on incremental squatting exercise

Info

Publication number: LU500401B1
Application number: LU500401A
Authority: LU
Inventors: Meng Ding
Original assignee: Univ Shandong
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-01-07

Abstract

The following S1: measure the height and weight of a subject; S2: subject perform squatting exercises with incremental load. The duration of each grade is T, squat n times in the first grade, and the times of squat exercises for each grade is increased by m times from the previous round; S3: Calculate the total number of squatting, and measure the maximum oxygen uptake of the subject by using the cardiopulmonary telemetry; the total number of squats, the height of the subject, the weight of the subject and the maximum oxygen uptake to establish a multiple regression equation, and use the least square method to solve the regression coefficients of the multiple regression equation; S4: Input the height, weight and total number of squatting of subject into multiple regression equation, calculate the subject's maximum oxygen uptake, and take the maximum oxygen uptake as the result of subject's cardiopulmonary endurance test.

Description

DESCRIPTION Indirect evaluation method of college students’ cardiorespiratory endurance based on incremental squatting exercise

TECHNICAL FIELD The invention relates to the field of cardiopulmonary endurance testing methods, in particular to an indirect evaluation method of cardiopulmonary endurance of college students based on incremental squat exercise.

BACKGROUND There are two ways to evaluate cardiopulmonary endurance: direct measurement and indirect measurement. Direct measurement provides the most accurate measurement but requires specific testing instruments, such as treadmill or cycle ergometer, and requires subjects to do extreme exercise, and the measurement operation is so cumbersome that many indirect measurement methods appeared. Most of the existing indirect measurement methods adopt sub-maximal loads and do not require specific equipment such as treadmills or cycle ergometer, but still need to measure physiological indicators such as blood pressure and heart rate, and require the cooperation of multiple people, which cannot be completed by a single person. The test methods are not flexible enough as they impose certain requirements for the test site

SUMMARY In order to solve the problems of the prior art, the invention provides an indirect evaluation method for cardiopulmonary endurance of college students based on incremental squat exercise, which predicts the maximum oxygen uptake of individual college students through incremental squat exercise, so that college students can measure the level of cardiopulmonary endurance independently according to the data of height, weight and squatting times of their own with the absence of physiological index testing instruments and without being limited by the size of the venue, thereby improving the enthusiasm of college students toward cardiorespiratory endurance testing, and enabling them to further understand the cardiorespiratory fitness status of their own, therefore promoting college students' participation in sports, and laying the foundation for national fitness and personal lifelong sports.

For the purpose of solving the above technical problems, the invention adopts the following technical scheme: The invention relates to an indirect evaluation method of cardiopulmonary endurance of college students based on incremental squat exercise, which comprises the following steps: Step (1) measure the height and weight of a subject; Step (2): the subject performs the squat exercise with incremental load, with the duration of each grade being T, the first grade squatting for n times, and then the number of squatting movements of each grade is increased by m times over the number of previous rounds; Step (3): Calculate the total number of squatting, and measure the maximum oxygen uptake of the subject by using the cardiopulmonary telemetry; Using the total number of squatting, the height of the subject, the weight of the subject and the maximum oxygen uptake to establish a multiple regression equation, and solve the regression coefficient of multiple regression equation by least square method; Step (4): Input the subject's height, subject's weight and total number of squatting into the multiple regression equation to calculate the subject's maximum oxygen uptake, and take the maximum oxygen uptake as the result of subject's cardiopulmonary endurance test.

Further, in the step (1), the height and weight of the subject are measured by a weight meter.

Further, the total number of squatting is calculated as follows: _ t t(t-30) INT(XTimes)=INT(Gga1t 500 In which, # is the time taken by the subject from the beginning to the end of squatting exercise, and the unit is seconds. a; is the number of squats of the first grade, d is the number of increments between successive grades, XTimes represents the total number of squats, and INT(XTimes) represents the rounding of the total number of squats.

Further, the multiple regression equation 1s established as: y = Bo + B1X, + B2X2 + B3X3 Among them, X,represents the height, X represents weight, X3 is the total number of squatting, y is the constant terms, and ß,,ß, and f3 are the regression coefficients.

Furthermore, the parameters 64, PB2,P3 and ßo are obtained by using least square method and Gaussian Elimination to solve the equation.

Compared with the prior art, the invention has the beneficial effects that:

The invention provides an indirect evaluation method of cardiopulmonary endurance of college students based on incremental squat exercise, which can enable college students to predict the level of cardiopulmonary endurance by their own height, weight and squatting times without physiological index testing instruments and without being limited by the size of the venue, thereby improving the initiative of college students toward cardiopulmonary endurance test, and enable them to better understand their cardiopulmonary fitness status, and promote college students to participate in sports, thus laying the foundation for national fitness and personal lifelong sports.

BRIEF DESCRIPTION OF THE FIGURES The figures of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. Fig. 1 is a test flow chart of the specific implementation of the present invention;

DESCRIPTION OF THE INVENTION It should be noted that the following detailed description is exemplary and is intended to provide further explanation for this application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as commonly understood by those of ordinary skill in the technical field to which this application belongs. It should be noticed that the terms used herein are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to this application. As used herein, unless the context clearly specified otherwise, the singular form 1s also intended to include the plural form.

In addition, it should also be understood that the terms "comprising" and/or "comprising" 1s used in this specification to represent the presence of features, steps, operations, devices, components and/or combinations thereof.

As shown in fig. 1, an indirect evaluation method of college students' cardiopulmonary endurance based on incremental squat exercise includes the following processes: Process 1: Measure the height and weight of the subject.

Used weight meter to measure the weight and height of the subject.

All subjects were randomly selected from the college students, which were required to fill-in the PAR-Q (Physical Condition Safety Questionnaire), volunteers who could not participate in the exercise test due to physical reasons were excluded.

Process 2: squat movement with incremental load (1) The squatting movement of incremental load was carried out according to the preset signal tones.

The signal tone sounds once, and the subject squats once, and the frequency of the signal tone increases according to the grade.

The load time of each level of the load used in the present invention was 30s, the first grade was squat for 10 times, and each grade increased 5 times.

For instance, the squatting times of the first five grades of the present invention were 10, 15, 20, 25 and 30 respectively . (2) Criteria of movements: @ Preparation posture: stand upright, feet as wide as shoulders, and look ahead,

(2) When squatting, the movements are natural and smooth, the knees and toes are in the same direction, the knees should not exceed the toes, knees do not turning inward, the palms face opposite, and the arms are raised horizontally.

At the lowest point of squat, the thighs are approximately parallel to the ground.

Then get up and restore the standing position, keep the back straight during the whole process. (3) Inhale when squatting down and exhale when getting up. (3) Criteria of termination: (1) More than three consecutive movements did not keep up with the rhythm of the signal tone; (2) More than three consecutive movements did not meet standards; (3) Being unable to continue exercising due to physical exhaustion after repeated encouragement, (4) Symptoms such as difficulty breathing, nausea, dizziness, tinnitus, chest pain, and extreme fatigue appeared; When any of the above termination criteria appears, stop the movement immediately; (4) Calculation of squatting times The number of squats is consistent with the number of signal tones, so the number of signal tones is the number of squats.

Calculate the number of squats according to the squatting time, and the calculation formula 1s _ t t(t-30) INT(XTimes)=INT(sa1+=—-—d)

In which, f is the time taken by the subject for doing squatting exercise, and the unit 1s seconds. a is the number of squats of the first grade, d is the number of increments between successive grades, XTimes represents the total number of squats, and INT(XTimes) represents the rounding of the total number of squats.

Process 3: Measure the maximum oxygen uptake The subjects wore a cardiopulmonary telemetry, and used treadmill to measure the maximum oxygen uptake.

Process 4: Establish a multiple linear regression model A multiple linear regression model was established according to the data of height, weight, squatting times and maximum oxygen uptake, the following formula as follows: y = Bo + B1X, + B2X2 + B3X3 Among them, X; represents the height, X, represents weight, X3 is the total number of squatting, Bo is the constant terms, and 6,,Pz and f are the regression coefficients.

Process 5: Solve multiple linear regression model by least square method The parameters f;, (2, B3 and f, are obtained by using least square method and Gaussian Elimination to solve the equation.

To sum up, the whole equation y= Bo + ,X1 + 2X5 + P3X3 can be obtained, which can predict the maximum oxygen uptake of individuals by height, weight and squatting times.

The foregoing descriptions are only preferred embodiments of the application, and are not intended to limit the application.

For those skilled in the art, the application can have various modifications and changes.

Any modification, equivalent replacement and improvement and the like that made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. An indirect evaluation method of cardiopulmonary endurance of college students based on incremental squat exercise, comprising: step (1) measure the height and weight of a subject; step (2): the subject performs the squat exercise with incremental load, with the duration of each grade being T, the first grade squatting for n times, and then the squatting exercise times of each grade are increased by m times compared with the times of the previous round; step (3): calculate the total number of squatting, and measure the maximum oxygen uptake of the subjects by using the cardiopulmonary telemetry; using the total number of squatting, the height of the subject, the weight of the subject and the maximum oxygen uptake to establish a multiple regression equation, and solve the regression coefficient of multiple regression equation by least square method; step (4): input the data of height, weight and total number of squatting of subject into the multiple regression equation, and calculate the subject's maximum oxygen uptake, then take the maximum oxygen uptake as the result of subject's cardiopulmonary endurance test.

2. An indirect evaluation method of cardiopulmonary endurance of college students based on incremental squat exercise according to claim 1, characterized in that in step (1), the height and weight of the subject are measured by a weight meter.

3. An indirect evaluation method of college students' cardiopulmonary endurance based on incremental squat exercise according to claim 1, characterized in that the total number of squatting 1s calculated as follows: INT(X rimes) INT (Eat 22) in which, f is the time taken by the subject for doing squatting exercise from beginning to the end, and the unit is seconds; a1 is the number of squats of the first grade, d is the number of increments between successive grades, XTimes represents the total number of squats, and INT(XTimes) represents the rounding of the total number of squats.

4. An indirect evaluation method of college students' cardiopulmonary endurance based on incremental squat exercise according to claim 1, characterized in that the multiple regression equation is established as: y = Bo + B1X, + B2X2 + B3X3 among them, X,represents the height, X, represents weight, X3 is the total number of squatting, By is the constant terms, and f;, 8, and f3 are the regression coefficients.

5. An indirect evaluation method of college students' cardiopulmonary endurance based on incremental squat exercise as claimed in claim 4, characterized in that the parameters Pi, B2, P3 and Po are obtained by using least square method and Gaussian Elimination to solve the equation.