GENUD/Growth, Exercise, NUtrition and Development Research Group, School of Health Science, University of Zaragoza, Avenida Domingo Miral s/n, Zaragoza, Spain.
Am J Prev Med. 2011 Jun;40(6):599-607. doi: 10.1016/j.amepre.2011.03.001.
Physical activity is necessary for bone mass development in adolescence. There are few studies quantifying the associations between physical activity and bone mass in adolescents.
To assess the relationship between moderate-to-vigorous physical activity (MVPA) and vigorous physical activity (VPA) and bone mass in adolescents.
Bone mass was measured by dual-energy X-ray absorptiometry and physical activity by accelerometers in 380 healthy Spanish adolescents (189 boys, aged 12.5-17.5 years) from the HELENA-CSS (2006-2007). Subjects were classified according to the recommended amount of MVPA (<60 minutes or ≥60 minutes of MVPA/day). Receiver operating characteristic curve analysis was applied to calculate the relationship between physical activity and bone mass.
Less than 41 and 45 minutes of MVPA/day are associated with reduced bone mass at the trochanter and femoral neck. More than 78 minutes of MVPA/day is associated with increased bone mineral density (BMD) at the femoral neck. Regarding VPA, more than 28 minutes/day for the hip and intertrochanter and more than 32 minutes/day for the femoral neck are associated with increased BMD.
The recommended amount of physical activity (minutes/day) seems insufficient to guarantee increased bone mass. With some minutes of VPA/day, bone adaptations could be obtained at different bone sites.
体育活动对青少年的骨量发育是必要的。目前很少有研究量化青少年体育活动与骨量之间的关系。
评估中等至剧烈体力活动（MVPA）和剧烈体力活动（VPA）与青少年骨量之间的关系。
在 HELENA-CSS（2006-2007）研究中，通过双能 X 射线吸收仪测量了 380 名健康西班牙青少年（189 名男孩，年龄 12.5-17.5 岁）的骨量，并用加速度计测量了体力活动。根据推荐的 MVPA 量（<60 分钟或≥60 分钟/天）对受试者进行分类。应用受试者工作特征曲线分析来计算体力活动与骨量之间的关系。
每天进行少于 41 分钟和 45 分钟的 MVPA 与转子间区和股骨颈骨量减少有关。每天进行多于 78 分钟的 MVPA 与股骨颈骨矿物质密度（BMD）增加有关。对于 VPA，每天髋关节和转子间区超过 28 分钟，以及每天股骨颈超过 32 分钟与 BMD 增加有关。
推荐的体力活动量（分钟/天）似乎不足以保证骨量增加。每天进行一些 VPA，可在不同的骨部位获得骨适应。
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