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首页> 外文期刊>Journal of athletic training >Side-Alternating Vibration Training for Balance and Ankle Muscle Strength in Untrained Women
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Side-Alternating Vibration Training for Balance and Ankle Muscle Strength in Untrained Women

机译：侧向交替振动训练对未受过训练的女性的平衡和踝部肌肉的力量

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Context: Side-alternating vibration (SAV) may help reduce the risk of falling by improving body balance control. Such training has been promoted as a strength-training intervention because it can increase muscle activation through an augmented excitatory input from the muscle spindles. Objective: To determine the effect of SAV training on static balance during 3 postural tasks of increasing difficulty and lower limb strength. Design: Randomized controlled clinical trial. Setting: Laboratory. Patients or Other Participants: A total of 21 healthy women were divided into training (n = 11; age = 43.35 ± 4.12 years, height = 169 ± 6.60 cm, mass = 68.33 ± 11.90 kg) and control (n = 10; age = 42.31 ± 3.73 years, height = 167 ± 4.32 cm, mass = 66.29 ± 10.74 kg) groups. Intervention(s): The training group completed a 9-week program during which participants performed 3 sessions per week of ten 15-second isometric contractions with a 30-second active rest of 3 exercises (half-squat, wide-stance squat, 1-legged half-squat) on an SAV plate (acceleration = 0.91–16.3g). The control group did not participate in any form of exercise over the 9-week period. Main Outcome Measure(s): We evaluated isokinetic and isometric strength of the knee extensors and flexors and ankle plantar flexors, dorsiflexors, and evertors. Static balance was assessed using 3 tasks of increasing difficulty (quiet bipedal stance, tandem stance, 1-legged stance). The electromyographic activity of the vastus lateralis, semitendinosus, medial gastrocnemius, tibialis anterior, and peroneus longus was recorded during postural task performance, baseline and pretraining, immediately posttraining, and 15 days posttraining. Results: After training in the training group, ankle muscle strength improved (P = .03), whereas knee muscle strength remained unaltered (P = .13). Improved ankle-evertor strength was observed at all angular velocities (P = .001). Postural sway decreased in both directions but was greater in the mediolateral (P < .001) than anteroposterior (P = .02) direction. The electromyographic activity of the peroneus longus increased during the sharpened tandem (P = .001) and 1-legged tasks (P = .007). No changes were seen in the control group for any measures. Conclusions: The SAV training could enhance ankle muscle strength and reduce postural sway during static balance performance. The reduction in mediolateral sway could be associated with the greater use of ankle evertors due to their strength improvement.
机译：背景：侧向交替振动（SAV）可通过改善身体平衡控制来帮助降低跌倒的风险。这种训练已被作为一种力量训练干预手段而得到推广，因为它可以通过增加来自肌肉纺锤体的兴奋性输入来增加肌肉的激活。目的：确定在增加姿势难度和降低下肢力量的三个姿势任务中，SAV训练对静态平衡的影响。设计：随机对照临床试验。地点：实验室。患者或其他参与者：总共21名健康女性分为训练（n = 11;年龄= 43.35±4.12岁，身高= 169±6.60 cm，质量= 68.33±11.90 kg）和对照组（n = 10;年龄= 42.31±3.73岁，身高= 167±4.32厘米，质量= 66.29±10.74公斤）组。干预：培训小组完成了一个为期9周的计划，在此计划中，参与者每周进行3次练习，共进行10次15秒的等距收缩，并进行30秒钟的主动休息，共进行3次锻炼（半蹲，宽坐蹲，1次双腿半蹲）放在SAV板上（加速度= 0.91-16.3 g）。对照组在9周内未参加任何形式的运动。主要观察指标：我们评估了膝盖伸肌和屈肌以及踝plant屈，背屈和伸肌的等速和等距强度。使用增加难度的3个任务（安静的双足姿势，双人姿势，1腿姿势）评估静态平衡。在姿势任务执行，基线和训练前，训练后立即以及训练后15天期间记录了股外侧肌，半腱肌，腓肠肌内侧，胫骨前肌和腓骨长肌的肌电活动。结果：在训练组中进行训练后，踝部肌肉的力量得到改善（P = .03），而膝部肌肉的强度则保持不变（P = .13）。在所有角速度下均可观察到踝踝强度提高（P = .001）。姿势摇摆在两个方向上均减小，但在中外侧（P <.001）大于前后（P = .02）。在锐化串联运动（P = .001）和1腿任务（P = .007）期间，腓骨长肌的肌电活动增加。对照组在任何措施上均未见变化。结论：SAV训练可增强踝关节肌肉力量并减少静态平衡过程中的姿势摇摆。由于力量的提高，减少中外侧晃动可能与增加踝踝弯曲肌有关。

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