Mulder E, Linnarsson D, Paloski W H, Rittweger J, Wuyts F L, Zange J, Clément G
Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.
J Musculoskelet Neuronal Interact. 2014 Sep;14(3):359-66.
We tested whether intermittent standing or a combination of heel raising, squatting and hopping exercises was sufficient to prevent alteration in balance and gait following a 5-day bed rest.
This cross-over design study was performed with 10 male subjects during 6° head down tilt: (a) with no countermeasure; (b) while standing 25 min per day; (c) during locomotion-like activities 25 min per day. Gait was evaluated by grading subjects' performance during various locomotion tasks. Equilibrium scores were derived from peak-to-peak anterior-posterior sway while standing on a foam pad with the eyes open or closed or while making pitch head movements.
When no countermeasure was used, head movements led to decreased postural stability and increased incidence of falls immediately after bed rest compared to before. When upright standing or locomotion-like exercises were used, postural stability and the incidence of falls were not significantly different after the bed rest from the baseline.
These results indicate that daily 25-min of standing or locomotion-like exercise proves useful against postural instability following a 5-day bed rest. The efficacy of these countermeasures on locomotion could not be evaluated, however, because gait was not found to be altered after a 5-day bed rest.
我们测试了间歇性站立或足跟抬起、下蹲和跳跃运动相结合的方式是否足以预防5天卧床休息后平衡和步态的改变。
本交叉设计研究在10名男性受试者处于6°头低位倾斜状态下进行：(a) 不采取任何对策；(b) 每天站立25分钟；(c) 每天进行25分钟类似运动的活动。通过对受试者在各种运动任务中的表现进行评分来评估步态。平衡分数来自于睁眼或闭眼站在泡沫垫上或进行头部俯仰运动时前后摆动的峰峰值。
未采取任何对策时，与卧床休息前相比，卧床休息后头部运动导致姿势稳定性下降和跌倒发生率增加。当采用直立站立或类似运动的锻炼时，卧床休息后的姿势稳定性和跌倒发生率与基线相比无显著差异。
这些结果表明，每天25分钟的站立或类似运动的锻炼被证明对预防5天卧床休息后的姿势不稳定有用。然而，由于未发现5天卧床休息后步态发生改变，因此无法评估这些对策对运动能力的效果。
