| As one of the hot issues, the health problem of students has been attracted by the state, society, school and family. However, college students as a pillar of the state, will face a serious life and working pressure, so the physical health of college students should get countries and schools. According to students’ physique health survey in recent years, undergraduates of endurance running performance declining trend year by year. Endurance running of the reaction is cardiopulmonary endurance level, however, cardiopulmonary endurance level with a cardiovascular risk is highly associated, therefore, undergraduates of substandard endurance running performances may be the future cardiovascular disease, high-risk groups should be given attention. Electrocardiogram is the occurrence of heart excited, spread, and the objective index of the recovery process, monitoring and evaluating cardiac function is commonly used and most basic detection means, is the diagnosis of cardiac activity analysis foundation and the important basis.Therefore, this study raised 162 undergraduates of substandard endurance running performance, as the research object of this article, explore the quiet electrocardiogram characteristics for undergraduates of substandard endurance running performance, exercise electrocardiogram characteristics, under different cardiovascular risk factor levels the quiet electrocardiogram and exercise electrocardiogram feature comparison. Used in the study of the research on related literature retrieval, with a summary of the literature of access to the guide, to provide the reference and theoretical support to the research of this paper. To raise the endurance running substandard basic information of college students and cardiovascular risk factors, height, weight, waist circumference, blood pressure and electrocardiogram test indicators, and through the descriptive statistics analysis, multivariate analysis of variance, chi-square test results for statistical analysis.Results:(1) The body of basic features of undergraduates that endurance running is not standardt: The whole endurance running undergraduates to make the average VO2 max was 30.82±5.36 ml· min- 1·kg-1 belongs to the people of low cardiopulmonary endurance, other indexes belongs to the normal range. Among them, the boy is the average BMI of 24.49±3.91 kg/m2, belong to the scope of overweight(BMI greater than or equal to 24), girls average percentage of body fat was 25.77±5.18%, belong to the scope of overweight; Average waist-hip ratio of boys to girls all fall within the scope of ideal waist-to-hip ratio.(2) The quiet electrocardiogram characteristics for undergraduates of substandard endurance running performance: The number of completely normal accounted for 17.3%, the number of quiet electrocardiogram abnormalities accounted for 82.7%. Indicators mainly of the anomaly is systolic blood pressure, P wave duration, ST segment of the anomaly, the anomaly detection rate respectively of 9.3%, 28.4% and 61.1%.(3) Before exercise, exercise to exhaustion, active passive recovery phase recovery and the heart rate, blood pressure change trend belongs to the normal physiology reaction(with the increase of sports load increasing heart rate and blood pressure, slow down after exercise). Recovery heart rate and the blood pressure during exercise, the proportion of exception were 6.2%, 19.8%; Increase of sports load, ST segment lower amplitude increases, the active recovery phase ST segment continues to depress, average rate reached-2.67 mv, lower in passive recovery phase back to normal. In the warm-up phase, movement, exhaustion, active recovery phase, passive recovery phase, ST segment of lower ratio were 72.4%, 64.2%, 68.3%, 69.1%, 0%.(4) Undergraduates of substandard endurance running cardiovascular risk factors features: Sit quietly lifestyle is the prevalence of cardiovascular risk factors,girls were more than boys, the second is the family history of cardiovascular disease. Endurance running substandard level of cardiovascular risk distribution between the group of college students is found that endurance running college students to make cardiovascular risk level distribution is different, proportion of high, medium and low risk distribution have significant difference.(5) ECG characteristics comparison: Different levels of cardiovascular risk based on cardiovascular risk factors scoring method, endurance running substandard college students can be divided into high, medium and low risk group. High risk and low risk groups were compared with quiet condition SBP and QTc values have significant difference(P﹤0.01); High-risk group compared with low risk group, exercise electrocardiogram in the exhaustion and passive recovery phase of SBP exists significant difference(P﹤0.01), the active recovery phase of ST segment lower amplitude has significant difference(P﹤0.01).Conclusion: 1. The endurance run cardiopulmonary endurance level college students belong to low to make people.2. Endurance running substandard college students is the most important cardiovascular risk factors are doing less.3. Endurance running substandard quiet electrocardiogram abnormalities mainly for college students, quiet, blood pressure, an abnormal ST segment and process of abnormal P wave, but a critical abnormal level.4. The different levels of cardiovascular risk factors below-standard endurance running college students, quiet, exercise exhaustion and recovery phase, systolic blood pressure has significant difference;Quiet electrocardiogram QTc has significant difference between values.Movement mainly abnormal ECG ST segment for warm up and active recovery period of low.5. Endurance running college students to make the risk of cardioascular risk grouping of different level distribution have significant difference.Suggestion: 1. Endurance running substandard sports college students, should be paid attentions in the training of teaching cardiopulmonary endurance and high college students.3.To focus on strengthening its cardiopulmonary endurance level, through the control and reduce the number of cardiovascular risk factors, to reduce cardiovascular risk level. |
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