Hopman M T, Kamerbeek I C, Pistorius M, Binkhorst R A
Department of Physiology, University of Nijmegen, The Netherlands.
Int J Sports Med. 1993 Oct;14(7):357-61. doi: 10.1055/s-2007-1021192.
The purpose of this study was to examine whether lower body positive pressure (LBPP) could improve maximal performance in paraplegic subjects (P). LBPP may diminish venous blood pooling (VBP) below the lesion and, therefore, support the redistribution of blood during exercise. Twelve male P subjects with complete spinal cord-lesions between T6 and T12, and 13 male able-bodied control subjects (C), performed maximal arm-cranking exercise with and without LBPP (52 mmHg) by means of an anti-gravity suit. P and C subjects had a significantly lower maximal heart rate (HRmax) with LBPP than without (P: 176 +/- 10 vs 184 +/- 7 b.min-1; C: 174 +/- 8 vs 177 +/- 8 b.min-1), whereas maximal power output (Wmax) and oxygen uptake (VO2max) remained unchanged. This suggests that LBPP provides P and C with central hemodynamic benefits. These benefits, however, did not result in improvements in Wmax or VO2max, probably due to other limitations in the complex and closely linked oxygen uptake process. During submaximal exercise the circulatory benefits were more pronounced in P than in C, probably due to the decrease of the VBP by LBPP. The results of this study suggest that LBPP appears to offer both P and C groups a central hemodynamic benefit without improving maximal performance.
本研究的目的是检验下身正压（LBPP）是否能提高截瘫患者（P）的最大运动能力。LBPP可能会减少损伤部位以下的静脉血淤积（VBP），因此，有助于运动过程中血液的重新分配。12名T6至T12节段完全性脊髓损伤的男性P受试者和13名身体健全的男性对照受试者（C），通过抗重力服在有和无LBPP（52 mmHg）的情况下进行最大强度的手摇臂运动。P组和C组受试者在有LBPP时的最大心率（HRmax）显著低于无LBPP时（P组：176±10对184±7次/分钟；C组：174±8对177±8次/分钟），而最大功率输出（Wmax）和摄氧量（VO2max）保持不变。这表明LBPP为P组和C组带来了中心血流动力学益处。然而，这些益处并未导致Wmax或VO2max的提高，可能是由于复杂且紧密相连的摄氧过程中的其他限制因素。在次最大强度运动期间，P组的循环益处比C组更明显，可能是因为LBPP降低了VBP。本研究结果表明，LBPP似乎为P组和C组都带来了中心血流动力学益处，但并未提高最大运动能力。
