Institute of Biomedicine, University of León, Campus Universitario, León, Spain.
Scand J Med Sci Sports. 2010 Apr;20(2):200-7. doi: 10.1111/j.1600-0838.2009.00919.x. Epub 2009 Apr 20.
To determine whether 10 weeks of whole-body vibration (WBV) training has a significant effect on strength, muscle mass, muscle power, and mobility in older women, 26 subjects were randomly assigned to a WBV training group (n=13; mean age 79 years) and a control (CON) group (n=13; mean age 76 years). Maximal voluntary isometric contraction (MVIC) increased 38.8% in the WBV group, without changes in the CON group. Electromyographic activity of the vastus medialis (VM), the vastus lateralis, and the biceps femoris (BF) did not change in either group. Thigh muscle cross-sectional area increased significantly after training in VM (8.7%) and BF (15.5%). Muscle power at 20%, 40%, and 60% MVIC decreased from pre-test to post-test in the CON group; however, WBV training prevented the decrease in the WBV group. Consequently, mobility, measured by the Timed Up and Go test, increased significantly after training (9.0%) only in the WBV group. Ten weeks of lower limb WBV training in older women produces a significant increase in muscle strength induced by thigh muscle hypertrophy, with no change in muscle power. The adaptations to WBV found in the present study may be of use in counteracting the loss of muscle strength and mobility associated with age-induced sarcopenia.
为了确定全身振动（WBV）训练 10 周是否对老年女性的力量、肌肉质量、肌肉力量和活动能力有显著影响，将 26 名受试者随机分为 WBV 训练组（n=13；平均年龄 79 岁）和对照组（n=13；平均年龄 76 岁）。WBV 组的最大自主等长收缩（MVIC）增加了 38.8%，而对照组没有变化。股直肌（VM）、股外侧肌和股二头肌（BF）的肌电图活动在两组中均无变化。VM（8.7%）和 BF（15.5%）的大腿肌肉横截面积在训练后显著增加。在对照组中，从预测试到后测试，肌肉力量在 20%、40%和 60%MVIC 时均下降；然而，WBV 训练防止了 WBV 组的下降。因此，仅在 WBV 组中，通过计时起立行走测试测量的活动能力在训练后显著增加（9.0%）。下肢 WBV 训练 10 周可使老年女性的肌肉力量显著增加，肌肉力量无变化。本研究中发现的对 WBV 的适应可能有助于对抗与年龄相关的肌肉减少症引起的肌肉力量和活动能力的丧失。
