| Objective: This study was conducted to compare the statistical differences in body shape,body composition and cardiorespiratory fitness test results of non-athletic college students before and after an eight-week high-intensity interval training intervention,and to verify the effects of high-intensity interval training on body shape,body composition and cardiorespiratory fitness of non-athletic college students,in order to provide theoretical support for better improving the physical fitness of college students.The purpose of this study is to provide theoretical support for improving the physical fitness level of college students.Methods: Using a randomized controlled experimental design,40 non-athletic college students(10 males and 10 females in the experimental and control groups,respectively)from Tianjin Institute of Physical Education were selected to undergo 8weeks of high-intensity interval training intervention,and height,weight waist-hip ratio and body mass index were selected as the effect indicators for assessing body shape,body fat ratio,basal metabolism and skeletal muscle percentage were selected as the effect indicators for assessing body composition.Spirometry,maximal oxygen uptake and resting heart rate were selected as effect indicators to assess cardiorespiratory fitness.Effect indicators were collected before and after the intervention,and statistical comparisons were made within and between groups.Results: After the 8-week high-intensity interval training intervention,(1)body morphological indicators: no significant changes in height(P > 0.05)were observed in both experimental and control groups for males and females;a highly significant reduction in body weight,waist-to-hip ratio and BMI(P < 0.01)was observed in both males and females;(2)body composition indicators: a highly significant reduction in body fat percentage,basal metabolism(P < 0.01)and skeletal muscle percentage showed a very significant increase(P < 0.01);the body fat rate of the experimental group was slightly increased but not statistically significant(P > 0.05),basal metabolism showed a very significant decrease(P < 0.01),and skeletal muscle percentage showed a very significant increase(P < 0.01)in the experimental group of females.Both boys and girls in the control group had a certain degree of reduction in body weight and BMI(P < 0.05),with smaller changes compared to the experimental group;body fat percentage was significantly lower in both boys and girls(P < 0.05)(3)Cardiopulmonary function indexes: lung capacity was significantly increased in the experimental group of males,with statistical significance(P < 0.05),maximum oxygen uptake appeared to be very significantly increased(P < 0.01),and resting The lung volumes of the females were significantly higher(P < 0.01),the maximum oxygen uptake was significantly higher(P < 0.05),and the resting heart rate was significantly lower(P < 0.01).Both boys and girls in the control group showed a significant increase in spirometry and resting heart rate(P < 0.05),with a smaller increase than in the experimental group;the maximum oxygen uptake index,although somewhat increased in boys and girls,was not significantly different(P > 0.05).Conclusion: The 8-week high-intensity interval training program developed in this experiment can improve the body shape,body composition and cardiorespiratory fitness of non-athletic college students,but there is inconsistency in improving the body composition of male and female college students,suggesting that there may be gender differences in high-intensity interval training,and the training effect is better compared with traditional continuous training.Overall,high-intensity interval training is an effective means to improve body shape,body composition and cardiorespiratory fitness in non-athletic college students,and it is recommended to recommend high-intensity interval training to non-athletic college students. |
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