Impact exercise increases BMC during growth: An 8-year longitudinal study
Impact exercise increases BMC during growth: An 8-year longitudinal study
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DOI：
10.1359/jbmr.071201
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发表时间：
2008-07-01
影响因子：
6.2
通讯作者：
Snow, Christine
中科院分区：
文献类型：
--
作者：
Gunter, Katherine;Baxter-Jones, Adam D. G.;Snow, Christine
我们的目的是评估在青春期前的儿童谁参加了7个月的跳跃干预与对照组谁参加了相同时间的拉伸程序超过8年的髋关节BMC。我们假设跳跃者比对照组获得更多的BMC。报告的数据来自两组儿童，他们参加了单独的，但相同的，随机的，对照的，以学校为基础的冲击运动干预措施，并反映了那些同意长期随访的受试者（N = 57;跳跃者= 33，对照= 24; 47%的原始参与者）。在基线、干预后7个月和19个月通过DXA评估BMC，此后每年评估一次，持续5年（8年8次）。构建多水平随机效应模型，并用于预测每次测量时BMC相对于基线的变化。7个月后，完成高冲击跳跃运动的儿童比完成非冲击拉伸运动的对照组的髋部BMC高3.6%（p < 0.05），近8年后髋部BMC高1.4%（BMC经年龄、身高、体重和体力活动调整; p < 0.05）。这提供了第一个证据表明，在儿童早期进行的短期高强度运动对全髋关节BMC有持续影响。如果这些益处持续到成年早期，有效地增加峰值骨量，那么晚年的骨折风险可能会降低。
Our aim was to assess BMC of the hip over 8 yr in prepubertal children who participated in a 7-mo jumping intervention compared with controls who participated in a stretching program of equal duration. We hypothesized that jumpers would gain more BMC than control subjects. The data reported come from two cohorts of children who participated in separate, but identical, randomized, controlled, school-based impact exercise interventions and reflect those subjects who agreed to long-term follow-up (N = 57; jumpers = 33, controls = 24; 47% of the original participants). BMC was assessed by DXA at baseline, 7 and 19 mo after intervention, and annually thereafter for 5 yr (eight visits over 8 yr). Multilevel random effects models were constructed and used to predict change in BMC from baseline at each measurement occasion. After 7 mo, those children that completed high-impact jumping exercises had 3.6% more BMC at the hip than control subjects whom completed nonimpact stretching activities (p < 0.05) and 1.4% more BMC at the hip after nearly 8 yr (BMC adjusted for change in age, height, weight, and physical activity; p < 0.05). This provides the first evidence of a sustained effect on total hip BMC from short-term high-impact exercise undertaken in early childhood. If the benefits are sustained into young adulthood, effectively increasing peak bone mass, fracture risk in the later years could be reduced.