Tanimoto Michiya, Kawano Hiroshi, Gando Yuko, Sanada Kiyoshi, Yamamoto Kenta, Ishii Naokata, Tabata Izumi, Miyachi Motohiko
Division of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan.
Clin Physiol Funct Imaging. 2009 Apr;29(2):128-35. doi: 10.1111/j.1475-097X.2008.00847.x.
Metabolic syndrome is associated with reductions in basal limb blood flow. Resistance training increasing muscle mass and strength increases basal limb blood flow. Low-intensity resistance exercise with slow movement and tonic force generation (LST) has been proposed as one of the effective methods of resistance training increasing muscle mass and strength. The hypothesis that LST training increases basal femoral blood flow as well as traditional high-intensity resistance training at normal speed (HN) was examined. Thirty-six healthy young men without a history of regular resistance training were randomly assigned to the LST [approximately 55-60% one repetition maximum (1RM) load, 3 s lifting and 3 s lowering with no relaxation phase, n = 12], HN (approximately 85-90% 1RM, 1 s lifting and 1 s lowering with 1 s relaxation, n = 12) or sedentary control (CON, n = 12) groups. Participants in the training groups underwent two whole-body training sessions per week for 13 weeks. Basal femoral blood flow increased significantly by +18% in LST and +35% in HN (both P<0.05), while there was no such change in CON. There were no significant differences between these increases induced by LST and HN, although the increase in LST corresponded to about half that in HN. In conclusion, not only resistance training in HN but in LST as well, were effective for increasing basal limb blood flow, and that this effect was evident even in healthy young men.
代谢综合征与基础肢体血流量减少有关。抗阻训练可增加肌肉质量和力量，进而增加基础肢体血流量。低强度抗阻运动，即缓慢运动并产生静力的运动（LST），已被提议作为增加肌肉质量和力量的有效抗阻训练方法之一。本研究检验了LST训练与传统正常速度高强度抗阻训练（HN）一样能增加股部基础血流量的假设。36名无规律抗阻训练史的健康年轻男性被随机分为LST组（约55 - 60%的1次重复最大值[1RM]负荷，3秒举起和3秒放下，无放松阶段，n = 12）、HN组（约85 - 90%的1RM，1秒举起和1秒放下，1秒放松，n = 12）或久坐对照组（CON，n = 12）。训练组的参与者每周进行两次全身训练，共13周。LST组的股部基础血流量显著增加了18%，HN组增加了35%（均P<0.05），而CON组无此变化。LST组和HN组引起的血流量增加之间无显著差异，尽管LST组的增加量约为HN组的一半。总之，不仅HN组的抗阻训练，LST组的抗阻训练对增加基础肢体血流量也有效，且这种效果在健康年轻男性中也很明显。
