Low-frequency vibratory exercise reduces the risk of bone fracture more than walking: a randomized controlled trial.
Low-frequency vibratory exercise reduces the risk of bone fracture more than walking: a randomized controlled trial.
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DOI：
10.1186/1471-2474-7-92
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发表时间：
2006-11-30
影响因子：
2.3
通讯作者：
Leal, Alejo
中科院分区：
文献类型：
--
作者：
Gusi, Narcis;Raimundo, Armando;Leal, Alejo
全身振动（WBV）是一种新型运动，已越来越多地测试其预防体弱人群骨折和骨质疏松症的能力。目前市售的振动盘有两种：a)整盘上下振动； b) 支点左右两侧的往复垂直位移，增加横向加速度。最近的一些研究表明，上下板对于增加骨矿物质密度（BMD）和平衡是有效的；但往复板技术的有效性仍然未知。目的是比较使用频率低于 20 Hz 的往复平台的 WBV 和基于步行的锻炼计划对绝经后女性 BMD 和平衡的影响。 28 名未经身体训练的绝经后女性被随机分配到 WBV 组或步行组。两个实验项目均每周 3 次，持续 8 个月。每次振动训练包括 6 轮，每次 1 分钟（频率为 12.6 Hz，幅度为 3 厘米，膝关节弯曲 60°），轮次之间休息 1 分钟。每次步行训练包括 55 分钟步行和 5 分钟伸展运动。采用双能X射线骨密度仪测量髋部和腰部BMD（g·cm-2），并通过盲法火烈鸟测试评估平衡性。重复测量的方差分析根据基线数据、体重和年龄进行调整。 8个月后，WBV组股骨颈BMD比步行组增加了4.3%（P = 0.011）。相比之下，两组的腰椎 BMD 均未改变。 WBV 组（29%）的平衡能力得到改善，但步行组则没有。使用往复板进行为期 8 个月的振动锻炼是可行的，并且比步行更有效地改善骨折的两个主要决定因素：髋部 BMD 和平衡。
Whole-body vibration (WBV) is a new type of exercise that has been increasingly tested for the ability to prevent bone fractures and osteoporosis in frail people. There are two currently marketed vibrating plates: a) the whole plate oscillates up and down; b) reciprocating vertical displacements on the left and right side of a fulcrum, increasing the lateral accelerations. A few studies have shown recently the effectiveness of the up-and-down plate for increasing Bone Mineral Density (BMD) and balance; but the effectiveness of the reciprocating plate technique remains mainly unknown. The aim was to compare the effects of WBV using a reciprocating platform at frequencies lower than 20 Hz and a walking-based exercise programme on BMD and balance in post-menopausal women. Twenty-eight physically untrained post-menopausal women were assigned at random to a WBV group or a Walking group. Both experimental programmes consisted of 3 sessions per week for 8 months. Each vibratory session included 6 bouts of 1 min (12.6 Hz in frequency and 3 cm in amplitude with 60° of knee flexion) with 1 min rest between bouts. Each walking session was 55 minutes of walking and 5 minutes of stretching. Hip and lumbar BMD (g·cm-2) were measured using dual-energy X-ray absorptiometry and balance was assessed by the blind flamingo test. ANOVA for repeated measurements was adjusted by baseline data, weight and age. After 8 months, BMD at the femoral neck in the WBV group was increased by 4.3% (P = 0.011) compared to the Walking group. In contrast, the BMD at the lumbar spine was unaltered in both groups. Balance was improved in the WBV group (29%) but not in the Walking group. The 8-month course of vibratory exercise using a reciprocating plate is feasible and is more effective than walking to improve two major determinants of bone fractures: hip BMD and balance.