Background. Controlled whole-body vibration (CWBV) training has been applied to people with stroke. However, it remains inconclusive if CWBV reduces fall risk in this population. Objective. To (1) assess the immediate and retention effects of CWBV training on fall risk factors in people at postacute and chronic stages of stroke and (2) examine if CWBV dosage is correlated with the effect size (ES) for 3 fall risk factors: body balance, functional mobility, and knee strength. Methods. Twelve randomized controlled trials were included. ES was calculated as the standardized mean difference, and meta-analyses were completed using a random-effects model. Results. CWBV training may lead to improved balance and mobility immediately after training (ES = 0.27, P = .03 for balance; ES = 0.34, P = .02 for mobility) but not at the 3-month follow-up test (ES = 0.02, P = .89 for balance; ES = 0.70, P = .11 for mobility). CWBV affects knee strength capacity with mild ES (ES = 0.08 and 0.11, respectively, for immediate and retention effect; P ≥ .68 for both). Metaregression indicated that the immediate ES is strongly correlated with training dosage for balance (r = 0.649; P = .029) and mobility (r = 0.785; P = .036). Conclusions. CWBV training may benefit balance and mobility immediately, but the training effect may not persist among people with stroke. Additionally, the CWBV dosage correlates with the ES for body balance and mobility. More high-quality studies are needed to determine the retention effects of CWBV training.

中文翻译：

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受控全身振动训练对改善中风幸存者跌倒危险因素的功效：荟萃分析

背景。受控全身振动 (CWBV) 训练已应用于中风患者。然而，CWBV 是否能降低该人群的跌倒风险仍无定论。客观的。(1) 评估 CWBV 训练对中风后急性和慢性阶段人群跌倒危险因素的即时和保留效果，以及 (2) 检查 CWBV 剂量是否与以下 3 个跌倒危险因素的效应大小 (ES) 相关：身体平衡、功能灵活性和膝关节力量。方法。纳入了 12 项随机对照试验。ES 计算为标准化平均差，并使用随机效应模型完成荟萃分析。结果。CWBV 训练可能会在训练后立即改善平衡和活动能力（ES = 0.27，平衡 P = .03；ES = 0.34，P = . 02 的流动性）但不是在 3 个月的随访测试中（ES = 0.02，平衡 P = .89；ES = 0.70，流动性 P = .11）。CWBV 会影响轻度 ES 的膝关节力量能力（ES 分别为 0.08 和 0.11，即刻效应和保留效应；两者 P ≥ .68）。元回归表明即时 ES 与平衡训练剂量（r = 0.649；P = .029）和活动性（r = 0.785；P = .036）密切相关。结论。CWBV 训练可能立即有益于平衡和活动能力，但训练效果在中风患者中可能不会持续。此外，CWBV 剂量与 ES 的身体平衡和活动能力相关。需要更多高质量的研究来确定 CWBV 培训的保留效果。08 和 0.11，分别为即时和保留效果；两者的 P ≥ .68）。Metaregression 表明即时 ES 与平衡训练剂量 (r = 0.649; P = .029) 和活动性 (r = 0.785; P = .036) 密切相关。结论。CWBV 训练可能立即有益于平衡和活动能力，但训练效果在中风患者中可能不会持续。此外，CWBV 剂量与 ES 的身体平衡和活动能力相关。需要更多高质量的研究来确定 CWBV 培训的保留效果。08 和 0.11，分别为即时和保留效果；两者的 P ≥ .68）。Metaregression 表明即时 ES 与平衡训练剂量 (r = 0.649; P = .029) 和活动性 (r = 0.785; P = .036) 密切相关。结论。CWBV 训练可能立即有益于平衡和活动能力，但训练效果在中风患者中可能不会持续。此外，CWBV 剂量与 ES 的身体平衡和活动能力相关。需要更多高质量的研究来确定 CWBV 培训的保留效果。CWBV 训练可能立即有益于平衡和活动能力，但训练效果在中风患者中可能不会持续。此外，CWBV 剂量与 ES 的身体平衡和活动能力相关。需要更多高质量的研究来确定 CWBV 培训的保留效果。CWBV 训练可能立即有益于平衡和活动能力，但训练效果在中风患者中可能不会持续。此外，CWBV 剂量与 ES 的身体平衡和活动能力相关。需要更多高质量的研究来确定 CWBV 培训的保留效果。