Jumping improves hip and lumbar spine bone mass in prepubescent children: A randomized controlled trial
Jumping improves hip and lumbar spine bone mass in prepubescent children: A randomized controlled trial
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DOI：
10.1359/jbmr.2001.16.1.148
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发表时间：
2001-01-01
影响因子：
6.2
通讯作者：
Snow, CM
中科院分区：
文献类型：
--
作者：
Fuchs, RK;Bauer, JJ;Snow, CM
儿童时期的体力活动被认为是提高峰值骨量（骨矿物质含量[BMC]）的一种策略，可以减少骨质疏松相关的骨折。因此，我们研究了高强度跳跃对儿童髋部和腰椎骨量的影响。将89名年龄在5.9至9.8岁之间的青春期前儿童随机分为跳跃组（n = 25名男孩和n = 20名女孩）或对照组（n = 26名男孩和n = 18名女孩）。两组学生均在学校期间进行为期7个月的运动干预，每周3次。跳跃组进行100次，每次从61厘米的箱子上双脚跳跃，而对照组进行非冲击性拉伸练习。通过双能X线吸收测定法（DXA; Hologic QDR/4500-A）评估左侧股骨颈近端和腰椎（L1-L4）的BMC（g）、骨面积（BA; cm（2））和骨矿物质密度（BMD; g/cm（2））。峰值地面反作用力是从一个61厘米的盒子上进行100次双脚跳跃计算得出的。此外，人体测量特征（身高，体重和体脂），体力活动和膳食钙摄入量进行了评估。基线时，两组之间的人体测量特征、膳食钙摄入量或骨骼变量没有差异。7个月后，跳高运动员和对照组在身高、体重和体脂方面有相似的增长。使用重复测量协方差分析（ANCOVA;协变量，初始年龄和骨值，身高和体重的变化）BMC，主要结果变量，跳投有显着更大的7个月的变化，在股骨颈和腰椎比对照组（分别为4.5%和3.1%）。在次要结果（BMD和BA）的重复测量ANCOVA中，跳跃者腰椎BMD显著高于对照组（2.0%），股骨颈BMD接近统计学显著性（1.4%;p = 0.1185）。对于BA，跳跃者在股骨颈区域的增加显著大于对照组（2.9%），但在脊柱区域没有差异。我们的数据表明，在8倍体重的地面反作用力下跳跃是一种安全，有效和简单的方法，可以改善儿童髋关节和脊柱的骨量。该方案可以很容易地纳入体育课。
Physical activity during childhood is advocated as one strategy for enhancing peak bone mass (bone mineral content [BMC]) as a means to reduce osteoporosis-related fractures. Thus, we investigated the effects of high-intensity jumping on hip and lumbar spine bone mass in children. Eighty-nine prepubescent children between the ages of 5.9 and 9.8 years were randomized into a jumping (n = 25 boys and n = 20 girls) or control group (n 26 boys and n = 18 girls). Both groups participated in the 7-month exercise intervention during the school day three times per week. The jumping group performed 100, two-footed jumps off 61-cm boxes each session, while the control group performed nonimpact stretching exercises. BMC (g), bone area (BA; cm(2)), and bone mineral density (BMD; g/cm(2)) of the left proximal femoral neck and lumbar spine (L1-L4) were assessed by dual-energy X-ray absorptiometry (DXA; Hologic QDR/4500-A). Peak ground reaction forces were calculated across 100, two-footed jumps from a 61-cm box. In addition, anthropometric characteristics (height, weight, and body fat), physical activity, and dietary calcium intake were assessed. At baseline there were no differences between groups for anthropometric characteristics, dietary calcium intake, or bone variables. After 7 months, jumpers and controls had similar increases in height, weight, and body fat. Using repeated measures analysis of covariance (ANCOVA; covariates, initial age and bone values, and changes in height and weight) for BMC, the primary outcome variable, jumpers had significantly greater 7-month changes at the femoral neck and lumbar spine than controls (4.5% and 3.1%, respectively). In repeated measures ANCOVA of secondary outcomes (BMD and BA), BMD at the lumbar spine was significantly greater in jumpers than in controls (2.0%) and approached statistical significance at the femoral neck (1.4%;p = 0.1185). For BA, jumpers had significantly greater increases at the femoral neck area than controls (2.9%) but were not different at the spine. Our data indicate that jumping at ground reaction forces of eight times body weight is a safe, effective, and simple method of improving bone mass at the hip and spine in children. This program could be easily incorporated into physical education classes.