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采用文献法资料法和实验法调查119名中等职业学校学生(以下简称中职生)(16~18岁)的骨密度(bone mineral density,BMD)和参加运动的情况。结果显示男性运动组与不运动组BMD值有显著差异性。女性中职生运动组有使骨密度增加的趋势。运动时间长、运动频率高的组别BMD也高。男性每日运动时间大于1h组与小于1h组的BMD值具有显著性差异。结论:运动对BMD有积极影响,运动频率大于3次/周及每日运动时间超过1h对BMD的影响最为明显。
A total of 119 secondary vocational school students (hereinafter referred to as secondary vocational school students) (16-18 years old) of bone mineral density (BMD) and participation in exercise were investigated by literature method and experimental method. The results showed that male exercise group and non-exercise group BMD values were significantly different. Female vocational students exercise group has the tendency to increase bone density. Long-term exercise, high-frequency exercise group BMD is also high. There was a significant difference in the BMD of males who exercised more than 1 hour daily and less than 1 hour daily. Conclusion: Exercise has a positive effect on BMD. The most obvious effect on BMD is the exercise frequency greater than 3 times per week and daily exercise time more than 1 hour.