Nardone A, Tarantola J, Giordano A, Schieppati M
Division of Physical Therapy and Rehabilitation, Rehabilitation Institute of Veruno, Salvatore Maugeri Foundation, IRCCS, Veruno (NO) Italy.
Electroencephalogr Clin Neurophysiol. 1997 Aug;105(4):309-20. doi: 10.1016/s0924-980x(97)00040-4.
Body sway variables (sway area and sway path) were recorded by a dynamometric platform in 13 young subjects, standing quiet with feet together, with eyes open (EO) and eyes closed (EC), prior to and following two types of physical exercise (treadmill walking and cycle ergometer pedalling). Each exercise was performed under both fatiguing (above anaerobic threshold) and non-fatiguing conditions. Following fatiguing treadmill exercise, we observed a significant increase in body sway with respect to pre-exercise values. The increase was present under both visual conditions, affected both sway area and sway path and lasted until about 15 min from the end of the exercise. The Romberg quotient (the ratio of EC/EO of sway area, or sway path) significantly increased after the fatiguing exercise with respect to the non-fatiguing exercise. The mean position of the centre of foot pressure (CFP) was unchanged after the exercise. Fatigue induced an increase in the median frequency of oscillation of the centre of foot pressure, independent of the amplitude of sway. Non-fatiguing treadmill exercise induced no significant changes in sway or in its frequency content. Following fatiguing cycle ergometer exercise, a negligible increase or a decrease (under eyes closed condition) in body sway were observed. Non-fatiguing cycling exercise induced no significant changes or a decrease in sway. Control experiments showed that simple repetition of successive stance trials (without intercalated exercise) was able by itself to induce a decrease in sway. By taking this effect into account, both types of cycling exercises revealed a mild capacity to increase sway. We concluded that body sway increased after strenuous physical exercise, but was little affected by exercise performed below the estimated anaerobic threshold. The effects of fatigue on sway were short-lasting and of moderate extent, and therefore were not liable to seriously threaten body equilibrium.
通过测力平台记录了13名年轻受试者的身体摆动变量（摆动面积和摆动路径）。受试者双脚并拢安静站立，分别在睁眼（EO）和闭眼（EC）状态下，于两种体育锻炼（跑步机行走和自行车测力计蹬踏）之前和之后进行测量。每种锻炼都在疲劳（高于无氧阈值）和非疲劳条件下进行。在疲劳的跑步机锻炼后，我们观察到身体摆动相对于锻炼前的值有显著增加。这种增加在两种视觉条件下均存在，同时影响摆动面积和摆动路径，并且一直持续到锻炼结束后约15分钟。疲劳锻炼后，罗姆伯格商（摆动面积或摆动路径的EC/EO比值）相对于非疲劳锻炼显著增加。锻炼后足压力中心（CFP）的平均位置没有变化。疲劳导致足压力中心振荡的中位数频率增加，与摆动幅度无关。非疲劳的跑步机锻炼未引起摆动或其频率成分的显著变化。在疲劳的自行车测力计锻炼后，观察到身体摆动有可忽略不计的增加或（在闭眼条件下）减少。非疲劳的自行车锻炼未引起显著变化或摆动减少。对照实验表明，连续姿势试验的简单重复（无插入锻炼）本身就能导致摆动减少。考虑到这种效应，两种类型的自行车锻炼都显示出轻微的增加摆动的能力。我们得出结论，剧烈体育锻炼后身体摆动增加，但低于估计无氧阈值的锻炼对其影响较小。疲劳对摆动的影响是短暂且程度适中的，因此不太可能严重威胁身体平衡。
