Theisen D, Fornusek C, Raymond J, Davis G M
Department of Physical Education and Rehabilitation, Faculty of Medicine, Catholic University of Louvain, Louvain-la-Neuve, Belgium.
J Rehabil Med. 2002 Jul;34(4):171-5. doi: 10.1080/16501970213238.
This study analysed external power output and physiologic responses in 5 individuals with paraplegia during 40 minutes of electrical stimulation leg cycle exercise. Cycling was performed on a motor-driven isokinetic ergometer that enabled precise determinations of power output. Electrical stimulation was increased to 120-140 mA within the first 5 minutes and remained constant thereafter. Power output increased to 10.7 +/- 3.0 W after 2 minutes, dropped to 5.3 +/- 1.8 W after 6 minutes and subsequently recovered to 8.2 +/- 2.2 and 6.1 +/- 2.3 W after 19.5 and 40 minutes, respectively. Oxygen consumption increased to 0.47 +/- 0.09 l/min after 6 minutes and declined during the second half of the exercise bout. Gross mechanical efficiency after 19.5 minutes was elevated compared with the value after 6 minutes. Heart rate was significantly increased at the end of the trial. The time-dependent variability of power output and physiological responses question the concept of steady state for this form of exercise.
本研究分析了5名截瘫患者在40分钟电刺激腿部循环运动期间的外部功率输出和生理反应。运动在电动等速测力计上进行，该测力计能够精确测定功率输出。在最初5分钟内，电刺激增加到120 - 140毫安，此后保持恒定。2分钟后功率输出增加到10.7±3.0瓦，6分钟后降至5.3±1.8瓦，随后在19.5分钟和40分钟后分别恢复到8.2±2.2瓦和6.1±2.3瓦。6分钟后耗氧量增加到0.47±0.09升/分钟，并在运动后半段下降。19.5分钟后的总机械效率高于6分钟后的数值。试验结束时心率显著增加。功率输出和生理反应随时间的变化对这种运动形式的稳态概念提出了质疑。
