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首页> 外文期刊>Gait & posture >Effects of maximal oxygen uptake test and prolonged cycle ergometer exercise on the quiet standing control.
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Effects of maximal oxygen uptake test and prolonged cycle ergometer exercise on the quiet standing control.

机译：最大摄氧量测试和长时间骑行测功对​​安静站立控制的影响。

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This work aims at testing the influence of peripheral and central fatigue, after maximal oxygen uptake test (Test1) and prolonged (Test2) cycle ergometer exercises, respectively, on sway density curve (SDC) parameters of postural control. Sixteen healthy male subjects were submitted to stabilometric tests, before and after the exercises. The Test1 was started at 12.5W, with 12.5W/min increments and 50rpm cadence until exhaustion. From the respiratory gas exchange signals, the first ventilatory threshold was obtained by the v-slope method. After a minimum of 72h, the subjects performed the Test2 for 60min, at a power output corresponding to 70% of such threshold. Before and just after these exercises, a set of 10 stabilometric trials of 50s was performed, alternating the eyes open and closed conditions, intercalated by a 10s resting period. The resulting signals were used to obtain the SDC. The Test1 caused decrease of the mean of peaks duration in SDC (p<0.05), decreasing the stability level, with small changes in the rates of central nervous system (CNS) and muscular torque controls. Conversely, Test2 increased the mean of time intervals between peaks in SDC (p<0.05), thus decreasing the CNS commands rate with minor changes in the stability level. Visual privation had a greater effect on body sway than these exercises, which were applied to muscles that are not the main actuators in body sway control. Concluding, this study allowed discriminating the effects of exercise intensities on body sway control.
机译：这项工作旨在分别测试最大摄氧量测试（Test1）和延长的（Test2）周期测功机运动后，对姿势控制的摇摆密度曲线（SDC）参数的影响，以测试周围和中央疲劳的影响。在锻炼之前和之后，对16名健康的男性受试者进行了稳定性测试。 Test1以12.5W的功率启动，以12.5W / min的增量和50rpm的节奏进行直至耗尽。从呼吸气体交换信号，通过v斜率方法获得第一通气阈值。最少72小时后，受试者以相当于该阈值70％的功率输出执行Test2 60分钟。在进行这些练习之前和之后，进行了10次50s的稳定度试验，交替了睁眼和闭眼的状态，并以10s的休息时间进行了干预。所得信号用于获得SDC。 Test1导致SDC峰值持续时间平均值的减少（p <0.05），降低了稳定性水平，中枢神经系统（CNS）和肌肉扭矩控制率的变化很小。相反，Test2增加了SDC峰值之间的时间间隔的平均值（p <0.05），从而降低了CNS指令速率，而稳定性水平有微小变化。与这些锻炼相比，视觉剥夺对身体摇摆的影响更大，这些锻炼被应用于不是身体摇摆控制主要驱动力的肌肉。最后，这项研究可以区分运动强度对身体摇摆控制的影响。

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