No beneficial effect of aerobic whole-body electromyostimulation on lower limbs strength and power - a randomized controlled trial.

IF 2.1 3区医学 Q1 REHABILITATION BMC Sports Science Medicine and Rehabilitation Pub Date : 2024-07-02 DOI:10.1186/s13102-024-00931-4

Anne Krause, Christoph Centner, Moritz Walther, Daniel Memmert, Nicolas Walser, Ramona Ritzmann

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Abstract

Background: Applying whole-body electromyostimulation (wbEMS) to voluntary activation of the muscle is known to impact motor unit recruitment. Thus, wbEMS as an additional training stimulus enhances force-related capacities. This study aimed to evaluate the mono- and multiarticular strength adaptations to a running intervention with wbEMS compared to running without wbEMS.

Methods: In a randomized controlled trial (RCT), 59 healthy participants (32 female/ 27 male, 41 ± 7 years) with minor running experience conducted an eight-week running intervention (2x/ week à 20 min) with a wbEMS suit (EG) or without wbEMS (control group, CG). Maximal isokinetic knee extensor and flexor strength and jump height during countermovement jumps were recorded prior and after the intervention to assess maximal strength and power.

Results: Following eight weeks of running, maximal isokinetic knee extension torque decreased significantly over time for both interventions (EG $Δ$ -4%, CG $Δ$ -4%; F(1, 44.14) = 5.96, p = 0.02, $η$ = 0.12). No changes were observed for flexion torque (F(1, 43.20) = 3.93, p = 0.05, $η$ = 0.08) or jump height (F(1, 43.04) = 0.32, p = 0.57, $η$ = 0.01).

Conclusions: The outcomes indicate that there is no additional effect over neuromuscular function adaptations with the inclusion of wbEMS during running training. Knee extensor strength is even slightly reduced which supports the principle of training specificity in regards to strength adaptation. We conclude that strength improvements cannot be achieved by running with wbEMS.

Trial registration: German Clinical Trials Register, ID DRKS00026827, date 10/26/21.

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有氧全身肌电刺激对下肢力量和功率无益处--随机对照试验。

背景：在肌肉的自主激活过程中应用全身肌电刺激（wbEMS）可影响运动单位的募集。因此，作为一种额外的训练刺激，全身肌电刺激可增强与力量相关的能力。本研究旨在评估与不使用 wbEMS 的跑步相比，使用 wbEMS 的跑步干预对单关节和多关节力量的适应性：在一项随机对照试验（RCT）中，59 名有少量跑步经验的健康参与者（32 名女性/27 名男性，41 ± 7 岁）接受了为期八周的跑步干预（每周 2 次，每次 20 分钟），分为穿 wbEMS 套装组（EG）和不穿 wbEMS 组（对照组，CG）。在干预之前和之后，记录最大等速膝关节伸屈力量和反向运动跳跃高度，以评估最大力量和功率：跑步八周后，两种干预方法的最大等速膝关节伸屈力矩都随着时间的推移显著下降（EG Δ -4%，CG Δ -4%；F(1, 44.14) = 5.96, p = 0.02, η = 0.12）。屈伸力矩（F(1, 43.20) = 3.93, p = 0.05, η = 0.08）和跳跃高度（F(1, 43.04) = 0.32, p = 0.57, η = 0.01）没有发生变化：研究结果表明，在跑步训练中加入 wbEMS 不会对神经肌肉功能的适应产生额外影响。膝关节伸肌力量甚至略有下降，这支持了力量适应性训练的特异性原则。我们的结论是，使用 wbEMS 进行跑步训练无法提高力量：试验注册：德国临床试验注册中心，ID DRKS00026827，日期 10/26/21。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

BMC Sports Science Medicine and Rehabilitation Medicine-Orthopedics and Sports Medicine

CiteScore

3.00

自引率

5.30%

发文量

196

审稿时长

26 weeks

期刊介绍： BMC Sports Science, Medicine and Rehabilitation is an open access, peer reviewed journal that considers articles on all aspects of sports medicine and the exercise sciences, including rehabilitation, traumatology, cardiology, physiology, and nutrition.