Effect of 6-month whole body vibration training on hip density, muscle strength, and postural control in postmenopausal women: A randomized controlled pilot study
Effect of 6-month whole body vibration training on hip density, muscle strength, and postural control in postmenopausal women: A randomized controlled pilot study
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DOI：
10.1359/jbmr.0301245
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发表时间：
2004-03-01
影响因子：
6.2
通讯作者：
Boonen, S
中科院分区：
文献类型：
--
作者：
Verschueren, SMP;Roelants, M;Boonen, S
高频机械应变似乎能刺激动物的骨骼强度。在这项随机对照试验中，对绝经后妇女进行了24周的全身振动(WBV)训练，测量了她们的髋部骨密度。振动训练显著增加髋部骨密度。这些发现表明，WBV训练在预防骨质疏松症方面可能是有用的。简介：在不同的动物模型中，高频机械应变已被证明能刺激骨强度。然而，振动运动对人体骨骼的影响却鲜有研究。特别是在绝经后妇女中--她们患骨质疏松症的风险最大--缺乏关于振动负荷的安全性和有效性的随机对照数据。为评价高频负荷对绝经后妇女肌肉骨骼的影响，将70名年龄58~74岁的受试者随机分为全身振动训练组(WBV，n=25)、阻力训练组(RES，n=22)和对照组(Con，n=23)。WBV组和RES组每周训练三次，持续24周。WBV组在振动平台(35~40 Hz，2.28~5.09g)上进行静态和动态伸膝运动，机械负荷骨骼，诱发反射性肌肉收缩。Res组通过动态压腿和伸腿训练膝关节伸肌，阻力由低(20 RM)增加到高(8 RM)。CON组没有参加任何培训。在基线和干预6个月后用DXA测量髋部骨密度。通过电动测功机测量等长强度和动态强度。数据采用重复测量方差分析。结果：未观察到与振动相关的副作用。振动训练提高了等长肌力和动态肌力(分别为+15%和+16%；p<；0.01)，也显著增加了髋部骨密度(+0.93%，p<；0.05)。参加阻力训练的女性和年龄匹配的对照组的髋部骨密度没有观察到变化(分别为-0.60%和-0.62%；不显著)。结论：WBV训练可能是一种可行而有效的方法来改变老年女性跌倒和骨折的公认危险因素，并支持进一步的人类研究的必要性。
High-frequency mechanical strain seems to stimulate bone strength in animals. In this randomized controlled trial, hip BMD was measured in postmenopausal women after a 24-week whole body vibration (WBV) training program. Vibration training significantly increased BMD of the hip. These findings suggest that WBV training might be useful in the prevention of osteoporosis.Introduction: High-frequency mechanical strain has been shown to stimulate bone strength in different animal models. However, the effects of vibration exercise on the human skeleton have rarely been studied. Particularly in postmenopausal women-who are most at risk of developing osteoporosis-randomized controlled data on the safety and efficacy of vibration loading are lacking. The aim of this randomized controlled trial was to assess the musculoskeletal effects of high-frequency loading by means of whole body vibration (WBV) in postmenopausal women.Materials and Methods: Seventy volunteers (age, 58-74 years) were randomly assigned to a whole body vibration training group (WBV, n = 25), a resistance training group (RES, n = 22), or a control group (CON, n = 23). The WBV group and the RES group trained three times weekly for 24 weeks. The WBV group performed static and dynamic knee-extensor exercises on a vibration platform (35-40 Hz, 2.28-5.09g), which mechanically loaded the bone and evoked reflexive muscle contractions. The RES group trained knee extensors by dynamic leg press and leg extension exercises, increasing from low (20 RM) to high (8 RM) resistance. The CON group did not participate in any training. Hip bone density was measured using DXA at baseline and after the 6-month intervention. Isometric and dynamic strength were measured by means of a motor-driven dynamometer. Data were analyzed by means of repeated measures ANOVA.Results: No vibration-related side effects were observed. Vibration training improved isometric and dynamic muscle strength (+ 15% and + 16%, respectively; p < 0.01) and also significantly increased BMD of the hip (+ 0.93%, p < 0.05). No changes in hip BMD were observed in women participating in resistance training or age-matched controls (-0.60% and -0.62%, respectively; not significant). Serum markers of bone turnover did not change in any of the groups.Conclusion: These findings suggest that WBV training may be a feasible and effective way to modify well-recognized risk factors for falls and fractures in older women and support the need for further human studies.