目标:在两种环境之间过渡后,姿势控制恶化,在回归自然条件时突出感官冲突。水生浸没为研究过渡情况下的姿势控制适应提供了新的视角。我们的目的是研究在完全浸入水中进行长时间的鳍式游泳运动后,陆地上的即时和任务后静态姿势控制适应。
方法:在14名专业或休闲SCUBA潜水员中评估了站立静态姿势控制(11名男性,3名妇女;33.21±10.70岁),睁开和闭着眼睛,之前,紧接着,在完全浸入45分钟的鳍式游泳运动之后的20分钟内。压力中心指标(COP),包括平均位置,振幅,速度,使用力平台在内侧-外侧(x轴)和前后(y轴)方向上评估长度和95%椭圆。还评估了每个度量的Romberg比率。
结果:双向重复测量方差分析揭示了测量周期对COPxvel的显着影响(p=0.01),长度(p<0.01)和长度(p<0.01),外观(p<0.01)和长度(p<0.01)的视觉状况。尽管在所有时期Romberg比率都没有显着差异,但闭眼措施的系统性要高于睁眼措施。浸泡后,在两种视觉条件下,压力中心的速度和总轨迹均系统地低于基线值。
结论:浸泡后,COP速度和长度显著下降,提示可能与踝关节僵硬相关的感觉重新加权策略。
OBJECTIVE: Postural control deteriorates following a transition between two environments, highlighting a sensory conflict when returning to natural conditions. Aquatic immersion offers new perspectives for studying postural control adaptation in transitional situations. Our aim is to study immediate and post-task static postural control adaptation on land after a prolonged fin swimming exercise in total immersion.
METHODS: Standing static postural control was assessed in 14 professional or recreational SCUBA divers (11 men, 3 women; 33.21 ± 10.70 years), with eyes open and closed, before, immediately after, and in the following 20 min following a fully-immersed 45-min fin swimming exercise. Centre-of-pressure metrics (COP) including average position, amplitude, velocity, length and 95% ellipse were evaluated in medial-lateral (x-axis) and anterior-posterior (y-axis) directions with a force platform. The Romberg ratio was also assessed for each metric.
RESULTS: A two-way repeated measures analysis of variance revealed a significant effect of the measurement period on COPx vel (p = 0.01), COPy vel (p < 0.01) and Length (p < 0.01), and of the visual condition on COPy vel (p < 0.01) and Length (p < 0.01). Eyes closed measures were systematically higher than eyes open measures despite there being no significant difference in the Romberg ratio in all periods. Post-immersion, the velocity and total trajectory of the centre of pressure remained systematically lower than baseline values in both visual conditions.
CONCLUSIONS: Post-immersion, COP velocity and length significantly decreased, suggesting a sensory reweighting strategy potentially associated with ankle stiffening.