中学生作为国家未来的希望,肩负着国家富强的责任,他们的体质健康备受国家与社会的关注,但是近20年国民体质与健康调查报告显示,我国中学生体质健康持续下滑。如学生的速度、耐力及力量等方面持续下降,肥胖率和近视率居高不下,学生体质健康可以被看成是一个系统工程,其持续下滑的原因绝不是单一的,而是由复杂的多因素构成。采用文献资料法从生活方式、家庭、学校教育等方面分析中学生体质下滑原因。结果表明:不论是生活方式、家庭还是学校教育偏差的因素,最终主要原因是学生缺乏锻炼,具体体现在运动时间和强度不足,这也是学生体质健康持续下滑的症结。 Middle school students as the country’s future hope, shouldering the responsibility of the rich and powerful state, their physical health much national and social concerns, but nearly 20 years of national constitution and health survey shows that China’s secondary school students continued to decline in physical fitness. Such as student speed, endurance and strength continue to decline, obesity and high myopia, students can be seen as a physical health can be a systematic project, the reason for its continued decline is by no means a single, but by the more complex Factors constitute. Using the method of literature and information to analyze the causes of the decline of middle school students’ physique from the aspects of life style, family and school education. The result shows that the main reason for the lack of exercise is the lack of exercise, which is caused by the lack of exercise time and intensity, which is the crux of the continuous decline of students’ physical health, regardless of lifestyle, family or school education bias.