Effects Of High Intensity Interval Training On Body Composition,cardiopulmonary Fitness And Arterial Stiffness Of Obese Male College Students

Research objective: At present,the incidence of obesity in China is not optimistic.The trend of obesity among young people is increasingly obvious,and the chronic diseases caused by obesity are increasing year by year.At present,the mortality rate of cardiovascular diseases in China ranks the first in the world.The incidence of cardiovascular diseases is increasing year by year,and the affected population is becoming younger and younger.As one of the risk factors of cardiovascular diseases,arterial hardness can reflect the degree of cardiovascular health well.Studies have shown that exercise can effectively reduce fat and weight loss,reduce arterial stiffness,and improve cardiovascular health.In recent years,high intensity interval training,as an efficient and novel way of exercise,is favored by obese college students.High-intensity interval training has been shown to have great effects on weight loss,cardiorespiratory fitness,and cardiovascular health.However,at present,the study population of the effect of high intensity interval training on arterial hardness is generally normal or overweight(BMI<28 kg/m2),and the research data of obese(BMI≥28 kg/m2)male college students are few.Therefore,this paper conducted eight-week high-intensity interval training intervention for obese male college students to explore the influence of intervention on arterial hardness,and analyzed the correlation between changes in arterial hardness and changes in body weight,BMI,body fat percentage,blood pressure and maximal oxygen intake index.This study provides theoretical reference for obese male college students to reduce fat and weight,improve cardiopulmonary fitness,reduce arterial hardness and improve cardiovascular health.Research methods: In this experiment,20 obese male college students from Jinan Campus of Shandong University of Physical Education were recruited and screened as subjects.They were randomly divided into experimental group 10 and control group 10.The experimental group was used as exercise group for 8 weeks of high-intensity interval training,and other activities remained the same as before intervention.The control group,as the non-training group,did not receive exercise intervention,and its activity level remained the same as before intervention.Combined jumping mode is adopted as the motion scheme of this study.The training cycle is divided into 1-2 weeks of adaptation and 3-8 weeks of training.When high-intensity interval training is implemented,the main part of the training time is 30 minutes,a total of 6 groups of combined jumping movements,each movement in each group lasts 30 seconds(85%-95%HRmax intensity),after the time is up,the rest is 5-10 seconds,low intensity exercise(45%-55%HRmax intensity)during the rest.When the body was not fully recovered,the second training movement was carried out for 30 seconds with an interval of 5-10 seconds.7 movements were taken as a cycle and 1 cycle was taken as a group.There was a 2-minute rest between groups and no exercise was carried out during the rest period.Exercise intensity is monitored through a heart rate meter throughout exercise.Fatigue scale was used to reflect the fatigue degree of each group immediately after training.The indexes of body composition,cardiopulmonary fitness and arterial hardness were measured in both the experimental group and the control group before and after intervention.ba PWV and ABI indexes of the subjects were measured by Omron(BP-203RPEIII)arteriosclerosis detector,and the experimental data were processed by spss25.0 to analyze the changes of the subjects’ arterial hardness before and after the intervention of high-intensity interval training and the correlation analysis.To discuss the effects of high intensity interval training on body composition,cardiopulmonary fitness and cardiovascular health.Research results:1.Body composition indexes: body weight,BMI,body fat percentage and waist-to-hip ratio of subjects in the experimental group decreased significantly;There were no significant changes in body weight,BMI,body fat percentage and waist-to-hip ratio in the control group.2.Heart rate and blood pressure indicators: heart rate,systolic blood pressure and diastolic blood pressure of subjects in the experimental group decreased significantly;There were no significant changes in heart rate,systolic and diastolic blood pressure in the control group.3.Maximum oxygen uptake index: the maximum oxygen uptake index of the experimental group increased significantly;The maximal oxygen uptake index of the control group had no significant change.4.Arterial hardness indexes: ba PWV and ABI decreased significantly in the experimental group,but did not change significantly in the control group.5.Correlation analysis: the body weight,BMI and body fat percentage of the experimental group were directly proportional to the arterial hardness index,and the maximum oxygen uptake was inversely proportional to the arterial hardness index.Research conclusion:1.High intensity interval training can significantly reduce the weight,BMI,body fat percentage and waist-to-hip ratio of obese male college students,playing a good role in fat and weight loss.2.High intensity interval training can significantly reduce the heart rate and blood pressure of obese male college students,increase the maximum oxygen uptake,and improve the cardiopulmonary fitness of obese male college students.3.High intensity interval training can significantly reduce arterial stiffness and improve cardiovascular health.4.Changes in arterial stiffness can be reflected by body composition indexes(body weight,BMI,body fat percentage)and maximal oxygen uptake indexes,which can predict the risk of cardiovascular diseases.