EFFECTS OF PHYSICAL EXERCISE ON THE PHYSICAL CONDITIONING OF COLLEGE STUDENTS

ABSTRACT Introduction: The physical fitness of college students incites an alarming concern. Although the importance of fitness tests for college students has improved, the overall level and range are low. This requires colleges and universities to increase sports awareness and enrich their exercise methods. Relevant scientific articles can assist universities in promoting college students' physical and mental health. Objective: Analyze the effects of exercise on college students' physical fitness. Methods: We randomly selected 30 college students with normal cardiopulmonary function as volunteers for the research. Walking for 30 minutes was promoted, followed by a rapid walking test for college students. Factors such as breathing, heart rate, and other indicators during exercise were collected, measured, and evaluated. Results: The students in the research had good correlations with each index of oxygen uptake, CO2 exhalation, ventilation ratio, and heart rate during uniform running. The value of the indices tended to stabilize about 5 minutes after exercise. Conclusion: Active running exercise can improve aerobic endurance in college students. Physical fitness was improved in this trial. Level of evidence II; Therapeutic studies - investigation of treatment outcomes.


INTRODUCTION
Aerobic exercise is closely related to human health.There have been many studies on aerobic exercise and human health.At present, the academic burden of college students is too heavy, and the physical activity is too small, which leads to a decline in physical health.College girls tend to participate in fitness activities, mainly aerobic gymnastics and small ball games.Boys mainly participate in large-scale sports such as football and basketball.These items are all aerobic sports. 1 Participating in these physical activities on health is also a concern of many scholars.Jogging aerobic exercise has made many efforts to improve human health.Running has not been paid enough attention to in university physical education.We should make college students better understand the role of running aerobic exercise.Through experiments, this paper makes quantitative research on the science and rationality of physical exercise in colleges and universities.This paper aims to provide a scientific idea and approach for the in-depth development of sports in China.

METHOD Subjects
This study selected 30 healthy subjects with normal cardiopulmonary function and no motor impairment as experimental subjects. 2The basic information of the test subjects is shown in Table 1.
This article conducted a 30-minute healthy brisk walk test for college students.After setting the speed on the treadmill, the subjects walked quickly on the treadmill according to the prescribed pace. 3The subject's respiration and heart rate were measured on this basis.
The test time for healthy running is 30 minutes.This article sets the speed of the treadmill.Subjects wore a portable sphygmomanometer at the left wrist joint for one minute before completing the constant-speed training. 4Measure their blood pressure immediately after the measurement.

Simulation of cardiorespiratory endurance model in aerobic exercise
In this paper, the heart and lung detection system is used to collect the stable heart rate of the test subjects fifteen minutes before exercise, the instantaneous heart rate before exercise, and the heart rate five minutes after exercise. 5This paper builds a model based on the collected data (1)   (1) /( 1 This article calculates the magnitude of its rise from the blood pressure during exercise and the blood pressure during recovery. (3)

(
)( ) This paper analyzes the blood pressure before and after exercise using the following formula.
β' represents blood pressure 10 minutes after exercise.χ' stands for highest blood pressure.The subjects were divided into normal and abnormal blood pressure groups according to the different degrees of physical movement.
The following is the exercise frequency corresponding to the endurance of the heart and lungs of different subjects: The action frequencies corresponding to the rule actions are given below:

ETHICAL COMPLIANCE
Research experiments conducted in this article with animals or humans were approved by the Ethical Committee and responsible authorities of Hebei Sport University and Hebei Medical University following all guidelines, regulations, legal, and ethical standards as required for humans or animals.

Determination of various physiological indicators for healthy brisk walking
In the uniform fitness brisk walking, the technical indicators such as oxygen uptake, exhaled CO2 volume, minute ventilation, heart rate, and other technical indicators have a linear relationship with the health value. 6he index value was stable from the beginning of the exercise to about 5 minutes, and then the value gradually increased.(Table 2)

Determination of various physiological indicators of a healthy jogging
The oxygen uptake, CO2 exhalation, minute air volume, heart rate, and other indicators of the research subjects showed a linear relationship when jogging at a uniform speed.From the beginning of the exercise to 5 minutes, the index value gradually stabilized and then gradually increased. 7he physiological indicators of the research subjects were relatively stable and relatively high during healthy jogging at a uniform speed.(Table 3)

Maximum oxygen absorption test
The participants' heart rate and oxygen uptake will gradually increase with the load. 8The values decreased until the VO2max was reached and showed a downward trend.(Table 4)

DISCUSSION
Aerobic exercise can decrease the resting heart rate of college students and increase reflexive cardiac output.The results of this study showed that after jogging aerobic exercise, resting heart rate decreased and cardiac function improved. 9xercise can improve the physical function level of male college students.
Heart and lung function quality is an essential indicator of an athlete' s physical fitness.Different fitness methods have different effects on heart and lung function.Many researchers at home and abroad have conducted many stress tests on different populations. 10The results showed that moderate load exercise had the best effect on healthy exercise.The results of lactate metabolism and myocardial lactate uptake by isotope analysis showed that the lactate uptake in the myocardium was only 3%-9% during exercise with 40% V. O2max intensity.
The exercise above this intensity can improve the resistance of the heart muscle to lactic acid and thus improve the body' s function.
When the exercise load was low, the oxygen uptake index was relatively stable, and there was no significant difference in oxygen uptake between male and female athletes. 11The heart rate index t-test value was P<0.05.The significant difference between men and women may be that men and women have different sensitivities to the healthy brisk walking environment, and the heart rate indicators are easily affected under load and time.
This experiment adopts the healthy running method.The subjects ran evenly on the treadmill and set the running speed for 30 minutes.This experiment evaluates the effect of human heart and lung function through the results of a 20-meter run and a Cooper 12-minute run.This method is much better than the current domestic and Harvard ladder methods.Some experts have researched the heart and lung function changes of men and women who exercise to the "exhaustion" stage and of all age groups.At the same time, they analyzed the relationship between technical indicators such as heart rate and exercise time and the amount of oxygen uptake when exercised to "exhaustion." The study found that all indicators showed apparent age and gender characteristics.In this study, the oxygen uptake t-test value of fitness running was 0.0002 (P<0.05), and there was a significant difference between men and women.This indicated that with increasing load, there were significant differences in cardiorespiratory function and exercise capacity between men and women.We recommend paying attention to the intensity of exercise between men and women when engaging in physical activity.The heart rate t-check value was 0.094 (P>0.05),indicating no significant difference between the male and female groups.This is mainly due to the gradual stabilization of the heart rate index under high-intensity exercise loads.
The oxygen uptake t-test (P>0.05) of healthy brisk walking and healthy jogging has no data significance.Although the exercise load of the two is

Table 1 .
Subject profiles.represents the subject' s heart rate is standard.ω stands for lung function index.α i represents the subject' s blood pressure during regular activity and ᾱ ij represents the blood pressure during recovery during each exercise.

Table 2 .
Physiological parameters of healthy brisk and jogging subjects.

Table 3 .
Oxygen consumption and heart rate t-test for healthy brisk walking and healthy jogging.

Table 4 .
Information on All Physiological Parameters During the Maximum Oxygen Intake Test.