Department of Human Developmental Sciences, Faculty of Education, Hokkaido University, Kita-11, Nishi-7, Kita-ku, Sapporo, 060-0811, Japan.
Eur J Appl Physiol. 2011 Aug;111(8):1769-75. doi: 10.1007/s00421-010-1801-3. Epub 2011 Jan 9.
In order to test our hypothesis that muscle condition has an effect on the cognition of self-motion and consequently on the ventilatory response during exercise, six healthy subjects performed a moderate incremental exercise test (IET) on a cycle ergometer under two conditions [resistance exercise condition (REC) and control condition (CC)]. In the REC, resistance exercise (30 incline leg presses) was conducted during two sessions scheduled at 48 and then 24 h prior to the IET. For the CC, the subjects were instructed to refrain from participating in strenuous exercise for a period of 2 days prior to the IET. In the IET, the workload was increased from 78 to 118 watts in steps of 8 watts every 3 min. Although the ventilatory response during the IET was significantly higher in the REC than in the CC, there were no significant differences in cognitive indexes (RPE and awareness of change in workload) between the two conditions. In addition, the magnitude of muscle soreness was significantly higher in the REC than in the CC. However, the level of soreness in the REC was very low, and there were no significant differences in blood lactate concentration and integrated EMG between the two conditions. These results suggest that a change in peripheral neural reflex is the primary cause of increased ventilatory response to moderate exercise after resistance exercise, although the role of a cognitive element cannot be absolutely excluded.
为了验证我们的假设，即肌肉状况会影响对自身运动的认知，从而影响运动时的通气反应，我们让六名健康受试者在两种条件下（阻力运动条件 [REC] 和对照条件 [CC]）在自行车测力计上进行中度递增运动测试（IET）。在 REC 中，在 IET 前 48 小时和 24 小时进行两次阻力运动（30 次倾斜腿压）。对于 CC，要求受试者在 IET 前的 2 天内避免进行剧烈运动。在 IET 中，工作负荷每 3 分钟增加 8 瓦，从 78 瓦增加到 118 瓦。尽管 REC 期间的通气反应明显高于 CC，但两种条件下的认知指标（RPE 和对工作负荷变化的意识）没有显著差异。此外，REC 中的肌肉酸痛程度明显高于 CC。然而，REC 中的酸痛程度非常低，两种条件下的血乳酸浓度和整合 EMG 没有显著差异。这些结果表明，阻力运动后，外周神经反射的改变是中等强度运动通气反应增加的主要原因，尽管不能完全排除认知因素的作用。
