French Handball Federation, Créteil, France; French Society of Sport 's Physiotherapits (SFMKS Lab), Pierrefite sur Seine, France; Savoie Mont Blanc University, Chambéry, France; Inter-university Laboratory of Human Movement Biology (LIBM) EA 7424, Chambéry, France; University of Bretagne Occidentale, Brest, France.
University of Bretagne Occidentale, Brest, France; Brest CHRU, Morvan Hospital, Department of Physical Medicine and Rehabilitation, Brest, France.
Neurosci Lett. 2022 Jan 19;769:136366. doi: 10.1016/j.neulet.2021.136366. Epub 2021 Nov 28.
Postural control during complex tasks requires adequate sensory integration and somaesthetic reweighting: suboptimal postural strategies can lead to injury. We assessed the ability of healthy athletes to reweight somaesthetic signals during postural perturbations on different surfaces. Thirty-five young (16 ± 1 years), healthy, elite handball players participated in this cross-sectional study. Proprioceptive reweighting was evaluated via vibration of the triceps surae and lumbar muscles on firm and foam surfaces. Postural variables and the electromyographic activity of the gluteus medius (GM), semitendinosus (ST) and fibularis longus (FL) were recorded during the PRE (10 s), VIBRATION (20 s) and POST (20 s) periods. Ankle proprioception was predominantly used on the firm compared to foam support. However, two opposing behaviours were observed: a "rigid" strategy in which reliance on ankle proprioception increased on the foam, and a "plastic" strategy that involved a proximal shift of proprioceptive reliance (p < 0.001). The plastic strategy was associated with a more effective recovery of balance after vibration cessation (p < 0.05). ST activation was higher during POST in the rigid strategy and did not return to the PRE level (p < 0.05) whereas it did in the plastic strategy. Proprioceptive strategies for postural control are highly variable and future studies should evaluate their contribution to injury.
在复杂任务中，姿势控制需要充分的感觉整合和躯体感觉重新加权：姿势策略不佳可能导致受伤。我们评估了健康运动员在不同表面上进行姿势干扰时重新加权躯体感觉信号的能力。这项横断面研究共有 35 名年轻（16±1 岁）、健康的精英手球运动员参与。通过在坚硬和泡沫表面上振动小腿三头肌和腰背部肌肉来评估本体感受重新加权。在 PRE（10 秒）、VIBRATION（20 秒）和 POST（20 秒）期间记录姿势变量和臀中肌（GM）、半腱肌（ST）和腓肠肌（FL）的肌电图活动。与泡沫支撑相比，在坚硬的支撑面上更主要地使用踝关节本体感觉。然而，观察到两种相反的行为：在泡沫上增加对踝关节本体感觉的依赖的“刚性”策略，以及涉及本体感觉依赖近端转移的“塑性”策略（p<0.001）。与振动停止后平衡恢复更有效的策略相关（p<0.05）。在刚性策略中，POST 期间的 ST 激活更高，并且没有恢复到 PRE 水平（p<0.05），而在塑性策略中则恢复到 PRE 水平。姿势控制的本体感受策略具有高度的可变性，未来的研究应该评估它们对受伤的贡献。
