下腿の運動強度及び低圧阻血が前腕と下腿の同時運動時における循環系応答に及ぼす影響

概要

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This study investigated changes in forearm blood flow and cardiovascular parameters during concomitant forearm and calf exercise with low-pressure occlusion (LPO) using a calf cuff. Eight subjects performed four trials: light (20% MVC) dynamic handgrip exercise (HG), handgrip exercise and plantar flexion (HG + PF_50, PF_50 = isometric, 50% MVC) and concomitant exercise with low-pressure calf occlusion (HG + PF_50 + LPO, HG + PF_20 + LPO). LPO was achieved by inflation of the cuff immediately distal to the knee to a pressure of 90 torr. Forearm blood flow (FBF), mean arterial pressure(MAP), heart rate (HR) and forearm vascular conductance (FVC) were measured during each trial. In the HG + PF_50 + LPO trial, FBF and FVC in the working arm were significantly lower than in other trials (p<0.01), MAP and HR were significantly higher than in HG and HG + PF_50 (p<0.05). However, there was no significant difference between HG, HG + PF_50 + LPO and HG + PF_50 + LPO in any of the measured parameters. These results indicate that the metaboreflex induced by intense plantar flexion with low-pressure occlusion appears to be a major contributor to the decrease in forearm blood flow during combined exercise.
社団法人日本体育学会の論文
2003-03-10