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Effect of low repetition jump training on BMD in middle-aged women

低重复跳跃训练对中年女性骨密度的影响

基本信息

批准号：
18500470
负责人：
KATO Takeru
金额：
$ 0.95万
依托单位：
Suzuka University of Medical Science
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18500470/
关键词：
jump training bone mineral density middle-aged women low frequency and low repetition high-impact 閉経

项目摘要

The hypothesis of the present study was that low-repetition and high impact training of vertical jump, 2-3 times/week would be effective for improving/maintenance bone mineral density (BMD) in ordinary middle-aged women. Forty-one middle-aged postmenopausal women who swim 2-3 times/week at swimming club, with mean age, height and weight of 59.9±5.9 years, 155.4±3.8 cm and 52.1±7.0 kg, respectively, were divided into two groups; jump training and a control group. After 12 months of the jump training started, the second BMD measurement, by dual energy X-ray absorptiometry, were performed. Twenty-eight subjects (14 subjects in each groups) completed all measurements. The unpaired student t-test reviled that there was no significant BMD percent change in lumbar spine (L2-L4), total proximal femur, and femoral neck region between the two groups. Although there was no significant difference between two groups, the average values of BMD percent change in the jump training group was greater and close to 100%, compared to the control group. One of the reasons for no significant difference was found between two groups, would be the poor compliance of jump training (1.5 times/week). So that the subjects who had relatively high compliance of jump training (n=5 and 1.8 times/week) were selected and this group showed significantly higher BMD percent change in total proximal femur (99.8±5.0 vs 94.9±5.9%) and femoral neck region (100.2±5.5 vs 93.7±5.9%) than the control group. We concluded that low-repetition and high impact training may be effective especially proximal femur region for postmenopausal women. High compliance of jump training that ideally 2-3 times/week would be required to lead the training effects more clearly, and we expect that jump training may help the exercise prescription of keeping bone health for elderly people, even after menopause.

本研究的假设是，低重复、高强度的垂直跳跃训练，2-3次/周，对改善/维持普通中年女性的骨密度（BMD）是有效的。选取年龄59.9±5.9岁、身高155.4±3.8 cm、体重52.1±7.0 kg、每周在游泳俱乐部游泳2-3次的绝经后中年妇女41名，分为两组；跳跃训练和对照组。在开始12个月的跳跃训练后，通过双能x射线吸收仪进行第二次骨密度测量。28名受试者（每组14名）完成所有测量。未配对学生t检验显示，两组间腰椎（L2-L4）、股骨近端和股骨颈区域的骨密度百分比无显著变化。虽然两组之间没有显著差异，但与对照组相比，跳跃训练组的骨密度百分比变化的平均值更大，接近100%。两组间无显著性差异的原因之一是跳远训练依从性差（1.5次/周）。因此，我们选择了跳训练依从性相对较高的受试者（n=5和1.8次/周），该组在股骨总近端（99.8±5.0 vs 94.9±5.9%）和股骨颈区（100.2±5.5 vs 93.7±5.9%）的骨密度变化百分比明显高于对照组。我们的结论是，低重复和高强度的训练可能对绝经后妇女尤其是股骨近端区域有效。高依从性的跳跃训练，理想的是2-3次/周，训练效果更明显，我们期望跳跃训练可以帮助老年人保持骨骼健康的运动处方，即使是绝经后。