Raymond J, Davis G M, Climstein M, Sutton J R
Rehabilitation Research Centre, Faculty of Health Sciences, The University of Sydney, Australia.
Med Sci Sports Exerc. 1999 Jun;31(6):822-8. doi: 10.1097/00005768-199906000-00010.
The purpose of this study was to assess the cardiorespiratory responses during arm exercise with and without concurrent electrical stimulation-induced leg cycling in people with paraplegia.
On separate days, 10 subjects with spinal cord injuries (T5-T12) performed either arm cranking (ACE), or simultaneous arm cranking + electrical stimulation-induced leg cycling (ACE+ES-LCE) graded exercise tests.
During submaximal, steady-state exercise, ACE+ES-LCE elicited significantly higher VO2, (by 0.25-0.28 L x min(-1)) stroke volume (by 13 mL), and VE(BTPS) (by 9.4 L x min(-1)) compared with ACE alone. In contrast, there were no significant differences of submaximal HR, cardiac output, or power output between the exercise modes. At maximal exercise, ACE+ES-LCE elicited significantly higher VO2 (by 0.23 L x min(-1)) compared with ACE alone, but there were no differences in power output, HR, or VE(BTPS).
These results demonstrate that during submaximal or maximal exercise there was a greater metabolic stress elicited during ACE+ES-LCE compared with during ACE alone. The higher stroke volume observed during submaximal ACE+ES-LCE, in the absence of any difference in HR, implied a reduced venous pooling and higher cardiac volume loading during ACE+ES-LCE. These results suggest that training incorporating ACE+ES-LCE may be more effective in improving aerobic fitness in people with paraplegia than ACE alone.
本研究旨在评估截瘫患者在进行手臂运动时，有无同时进行电刺激诱导的腿部骑行时的心肺反应。
在不同日期，10名脊髓损伤（T5 - T12）患者分别进行了手臂曲柄运动（ACE）或同时进行手臂曲柄运动 + 电刺激诱导的腿部骑行（ACE + ES - LCE）分级运动测试。
在次最大稳态运动期间，与单独的ACE相比，ACE + ES - LCE引起的VO2显著更高（增加0.25 - 0.28 L·min⁻¹）、每搏输出量更高（增加13 mL）和VE（BTPS）更高（增加9.4 L·min⁻¹）。相比之下，两种运动模式在次最大心率、心输出量或功率输出方面没有显著差异。在最大运动时，与单独的ACE相比，ACE + ES - LCE引起的VO2显著更高（增加0.23 L·min⁻¹），但在功率输出、心率或VE（BTPS）方面没有差异。
这些结果表明，在次最大或最大运动期间，与单独的ACE相比，ACE + ES - LCE引起的代谢应激更大。在次最大ACE + ES - LCE期间观察到的更高每搏输出量，在心率无任何差异的情况下，意味着ACE + ES - LCE期间静脉血池减少且心脏容量负荷更高。这些结果表明，与单独的ACE相比，纳入ACE + ES - LCE的训练可能在改善截瘫患者的有氧适能方面更有效。
