PHYSICAL ACTIVITY TO IMPROVE THE PHYSIOLOGICAL INDEX OF CARDIOVASCULAR EFFECT

Introduction: Physical exercise can enhance the body’s ability to adapt to the external environment and improve the contractility of the heart. At the same time, it can help improve blood circulation and increase lung capacity. Objective: This article explores the critical role of sports in the prevention of cardiovascular diseases. Methods: This article conducts tests on related physiological indicators such as hemodynamic rheology for students who regularly participate in physical exercise and those who do not participate in physical exercise. Results: Students who exercise regularly and those who do not exercise mobilize faster cardiovascular function at the beginning of work. This shows good adaptability to sports. Conclusion: The use of fitness exercise prescription by students who exercise comprehensively has the most pronounced effect on improving vascular function. Level of evidence II; Therapeutic studies - investigation of treatment results


INTRODUCTION
Physical exercise has a good effect on developing various physical qualities such as strength, endurance, speed, agility, and flexibility of the human body.It can comprehensively promote the development of physical fitness.
This article takes the traditional sports majors and the management and journalism majors as the research objects.It conducts statistics, analysis, and comparative research on the physiological indicators of different groups of people after power cycling.I selected blood pressure, heart rate, and other important indicators to evaluate the cardiovascular function for experimental tests. 1 The article attempts to study the impact of sports on the human body through the changes of these indicators.Through literature materials and mathematical statistics articles, explore the impact of sports on the human cardiovascular system.We hope to provide experimental data and a theoretical basis for sports in terms of fitness effects.

Research object
There are 30 traditional sports majors and 30 management, and journalism majors included in the study.All subjects have no history of smoking and are in good health.Volunteers were informed of the contents of the experiment and signed a consent form before participating in the experiment. 2 Students majoring in traditional national sports have undergone long-term physical training, training at least 3 times a week, and each training time is 1.5 hours.The management and journalism majors participate in physical exercises twice a week, each time for one hour.The primary conditions of the subjects are shown in Table 1.

Literature data method
According to the research purpose of this article and the needs of the research content, we use the Internet, libraries, reference rooms, CNKI, document compilation, and other resources to collect relevant materials.

Experimental method
The experiment was carried out in two parts, with a one-week interval between the two experiments.The first experiment: The day before the subject was tested, we did not participate in any heavy physical activity or sports training and were guaranteed 8 hours of sleep. 3After a regular diet on the morning of the test day, rest for more than 1 hour.We have a heart rate at rest and perform a power bicycle load test.
The second experiment was carried out one week apart.Before the experiment, sleep, diet, and physical activity were equivalent to the first experiment.At the beginning of the second experiment, exercise on a power bicycle with a load of 50 watts for 5 minutes.Then exercise for 25 minutes at an exercise intensity of 60~70% of the maximum oxygen uptake. 4We recorded blood pressure and heart rate before exercise, immediately after exercise, 1 hour after exercise, 3 hours after exercise, and 5 hours after exercise.

Cardiovascular system simulation model
For the ventricle's cyclic diastolic and systolic movement, we usually use the pressure-volume curve to describe it visually.The pressure-volume curve relationship of the ventricle can be expressed as: p (t) represents the pressure of the ventricle.V (t) represents the change in blood volume of the ventricle over time.V d represents the tension-free ventricular volume at the end of the ventricular systole.E (t) is a time-varying elastic function.In the physiological sense, E (t) represents the elastic coefficient of the myocardium.The model points out that E (t) is mainly composed of two parts: the passive elasticity E p of the ventricle. 5It is a constant, representing the passive stretching of the myocardium when the ventricles are filled, and the value is 0.06mmHg/ml.The active elasticity of the ventricle E A (t) represents the active contractility of the ventricle and E A (t) can be obtained by the following formula: max ( ) ( ) The normalization function .Indicates the heart rate.E max is the maximum active elasticity of the ventricle.Therefore, the myocardial elastic coefficient E (t) is:

Mathematical Statistics
All data are expressed as plus or minus standard deviation.We use Spss13.0statistical software for analysis and use an independent sample T-test to test the difference of sample means.

The fitness value of sports
Different styles, characteristics, and exercise methods of sports can develop the strength, speed, endurance, flexibility, and coordination of human muscles and affect the functions of the human cardiovascular system, respiratory system, and central nervous system. 6Therefore, vigorously developing sports plays an essential role in human health.Promoting sports and fitness activities with Chinese national characteristics has a profound impact on national fitness.

The impact of sports on blood pressure and heart rate
It can be seen from Table 2 that the systolic blood pressure of the students majoring in traditional ethnic sports is significantly higher immediately after power cycling than when they are quiet (P=0.000).One hour after exercise, the systolic blood pressure returned to the resting level (P>0.05).However, the systolic blood pressure of management and journalism students immediately after bicycle exercise has an inevitable increase compared with the quiet time. 7Until 5 hours later, this indicator is still higher than the quiet level.
From Table 3, it can be seen that the diastolic blood pressure of the students of ethnic traditional sports majors increased significantly after 5 hours of cycling exercise compared with the quiet time (P=0.046).The increase in diastolic blood pressure immediately after exercise, 1 hour and 3 hours, was not significant, and the difference was not significant. 8The diastolic blood pressure of management and journalism students increased significantly after 3 hours of cycling exercise (P=0.001) compared to rest.The increase in diastolic blood pressure immediately after exercise and 1 hour after exercise was not significant, and the difference was not significant.
From Table 4, the heart rate of the students of ethnic traditional sports majors immediately after cycling exercise is significantly higher than that at rest (P=0.000).One hour after exercise, the heart rate returned to the resting level (P>0.05).The heart rate of management and journalism students immediately after cycling exercise was significantly higher than at rest (P=0.000).One hour after exercise (P=0.002), 3 hours after exercise (P=0.003), 5 hours after exercise (P=0.019), the heart rate was still higher than the level at rest.be inferred that long-term physical training can improve the function of the human cardiovascular system.
The systolic blood pressure of the students majoring in traditional ethnic sports after power cycling increased significantly compared with that at rest.One hour after exercise, the systolic blood pressure returned to the resting level.The systolic blood pressure of management and journalism students increased to a certain extent immediately after exercise.The systolic blood pressure was still higher than the level at rest 5 hours after exercise.
After power cycling, the diastolic blood pressure of the students majoring in traditional ethnic sports in the 5 hours after exercise was significantly higher than that in the quiet state, and the difference was not significant. 10The diastolic blood pressure of management and journalism students 3 hours after cycling exercise was significantly higher than that at rest, and the difference was not significant.
The heart rate of the students majoring in traditional national sports after power cycling increased significantly compared with that at rest.One hour after exercise, the heart rate returned to the resting level.The heart rate of management and journalism students immediately after cycling exercise was significantly higher than that of quiet time.The heart rate is still higher than the level at rest until 5 hours after exercise.
After acute exercise, the time for the systolic blood pressure and heart rate to return to a quiet level for the traditional ethnic sports students is shorter than that for the management and journalism students.Long-term physical exercise can promote the function of the human cardiovascular system.

CONCLUSION
With the vigorous development of national fitness sports in China, we should attach importance to and promote sports.Need to be committed to the development and development of sports with practical actions.The article recommends that non-physical students and people increase physical exercise appropriately.Choose suitable sports items as exercise content to enhance physical fitness.It is recommended to exercise no less than two times a week, and each exercise time is no less than 1.5 hours.

DISCUSSION
By comparing the changing trend of blood pressure after exercise, it can be found that the systolic blood pressure and pulse rate of the national traditional sports majors increase moderately after exercise, which is a normal reaction. 9The pulse of management and journalism students increased significantly after the exercise.The blood pressure was irregular, the systolic blood pressure was not raised much, and the pulse recovery time was long.This is the type of inability to respond.The faster the heart rate drops during the recovery period, and the shorter the recovery time, the better the cardiovascular function.The heart rate of the students majoring in traditional national sports has returned to the level of quiet one hour after exercise.
In contrast, the heart rate of the students majoring in management and journalism has been higher than the level of quiet time from the end of the exercise to 5 hours after exercise.The function of the cardiovascular system of the traditional national sports students after exercise is better than that of the management and journalism students.It can

Table 1 .
Basic information of subjects.

Table 2 .
Changes in systolic blood pressure after power cycling.

Table 3 .
Changes in diastolic blood pressure after power cycling.

Table 4 .
Heart rate changes after power cycling.