School of Physiotherapy and Exercise Science, Gold Coast campus, Griffith University, Queensland, Australia.
Am J Phys Med Rehabil. 2010 Dec;89(12):997-1009. doi: 10.1097/PHM.0b013e3181f71063.
Whole body vibration is a potential therapy for age-related loss of musculoskeletal competence. Vibration has improved bone in animal models, but evidence in humans is limited. Relative efficacy of low- vs. high-intensity whole body vibration is also unknown. Our goal was to observe the effect of brief low- and higher intensity whole body vibration on risk factors for hip fracture in postmenopausal women.
We used an 8-mo randomized controlled trial design to examine the influence of twice-weekly low-intensity whole body vibration (15 mins, 30 Hz, 0.3 g) or higher intensity whole body vibration (2 × 3 mins, 12.5 Hz, 1 g) on anthropometrics, bone (whole body, hip, spine, forearm, and heel), muscle (wall squat and chair rise), and balance (tandem walk and single leg stance). Physical activity, daily calcium, and compliance were recorded. Effects were examined by repeated-measures analysis of covariance, controlling for age, height, weight, calcium, physical activity, compliance, and baseline values.
Forty-seven women (71.5 ± 9.0 yrs) completed the trial. There were no between-group differences in any measure at 8 mos, but within-group effects were evident. Controls lost bone at the trochanter (-6%, P = 0.03) and lumbar spine (-6.6%, P = 0.02), whereas whole body vibration groups did not. Whole body vibration subjects improved wall squat (up to 120%, P = 0.004) and chair rise performance (up to 10.5%, P = 0.05).
Eight mos of twice-weekly whole body vibration may reduce bone loss at the hip and spine and improve lower limb muscle function. These changes may translate to a decreased risk of falls and hip fracture.
全身振动是一种治疗与年龄相关的肌肉骨骼功能下降的潜在疗法。振动已在动物模型中改善了骨骼，但人类的证据有限。低强度与高强度全身振动的相对疗效也不清楚。我们的目标是观察短暂的低强度和高强度全身振动对绝经后妇女髋部骨折风险因素的影响。
我们使用 8 个月的随机对照试验设计来研究每周两次低强度全身振动（15 分钟，30 Hz，0.3 g）或高强度全身振动（2×3 分钟，12.5 Hz，1 g）对人体测量学、骨骼（全身、髋部、脊柱、前臂和脚跟）、肌肉（墙壁深蹲和椅子上升）和平衡（并足行走和单腿站立）的影响。记录了身体活动、日常钙摄入量和依从性。通过重复测量协方差分析检查效果，控制年龄、身高、体重、钙、身体活动、依从性和基线值。
47 名女性（71.5±9.0 岁）完成了试验。8 个月时，两组间任何指标均无差异，但组内差异明显。对照组在转子间（-6%，P=0.03）和腰椎（-6.6%，P=0.02）处骨量减少，而全身振动组则没有。全身振动组的墙壁深蹲（最高增加 120%，P=0.004）和椅子上升表现（最高增加 10.5%，P=0.05）有所改善。
每周两次全身振动 8 个月可能减少髋部和脊柱的骨丢失，并改善下肢肌肉功能。这些变化可能转化为跌倒和髋部骨折风险的降低。
