This paper explored the effects of body mass index classification and college students' physical function index in a study of the 1364 male students Henan university of agriculture subjects were divided into 4 groups. The result showed that the variation on physical fitness indicators among the different body composition differs from one another, the cardiovascular function, respiratory function, arm strength and lower limb explosive power of nomal weight group is superior to the low weight (except for respirtory function), over weight and obese group (except for arm strength), low weight (except for respirtory function), Over-weight and obesity all have negative effects on students' physical function.
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