Hotta Norio, Yamamoto Kaoru, Sato Kohei, Katayama Keisho, Fukuoka Yoshiyuki, Ishida Koji
Graduate School of Medicine, Nagoya University, Nagoya, Japan.
Eur J Appl Physiol. 2007 Oct;101(3):347-58. doi: 10.1007/s00421-007-0500-1. Epub 2007 Jul 17.
We compared the ventilatory and circulatory responses during 20 s of light dynamic leg and arm exercises performed separately using dominant and non-dominant limbs. Seventeen subjects performed a 20-s single-leg knee extension-flexion exercise with a load of 5% of maximal muscle strength attached to the ankle. Fifteen of the seventeen subjects also did a single-arm elbow flexion-extension exercise in which a load was attached to the wrist in the same way as in the leg exercise. Similar movements were passively performed on the subjects by experimenters to avoid the effects of central command. The magnitude of change from rest (gain) in minute ventilation during passive movement (PAS) was significantly smaller in the dominant limbs than in the non-dominant limbs, though a significant difference was not detected during voluntary exercise (VOL). In contrast, heart rate and blood pressure responses did not show any differences between the dominant and non-dominant limbs during either VOL or PAS. In conclusion, the initial ventilatory response to PAS in the dominant limbs was lower than that of the non-dominant limbs, though the ventilatory response to VOL was not. Circulatory responses were not different between the dominant and non-dominant limbs. These results suggest that peripheral neural reflex during exercise could be different between dominant and non-dominant limbs and that ventilatory response at the onset of exercise might be controlled by the dual neural modulation of central command and peripheral neural reflex, resulting in the same ventilatory response to both dominant and non-dominant limb exercise.
我们比较了分别使用优势肢体和非优势肢体进行20秒轻度动态腿部和手臂运动期间的通气和循环反应。17名受试者进行了20秒的单腿膝关节屈伸运动，脚踝处附着有最大肌肉力量5%的负荷。17名受试者中的15名还进行了单臂肘关节屈伸运动，手腕处附着的负荷与腿部运动相同。实验人员对受试者进行了类似的被动运动，以避免中枢指令的影响。被动运动（PAS）期间，优势肢体每分钟通气量相对于静息状态（增益）的变化幅度显著小于非优势肢体，尽管在自主运动（VOL）期间未检测到显著差异。相比之下，在VOL或PAS期间，优势肢体和非优势肢体的心率和血压反应均未显示出任何差异。总之，优势肢体对PAS的初始通气反应低于非优势肢体，尽管对VOL的通气反应并非如此。优势肢体和非优势肢体的循环反应没有差异。这些结果表明，运动期间优势肢体和非优势肢体的外周神经反射可能不同，运动开始时的通气反应可能受中枢指令和外周神经反射的双重神经调节控制，从而导致对优势肢体和非优势肢体运动的通气反应相同。
