Effects of exercise intensity and low-pressure occlusion in calf on cardiovascular responses during concomitant forearm and calf exercise
Year: 2003
Type: article
Abstract: 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.
Institution: Waseda University
Language: English
Subfield: Complementary and alternative medicine
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2757260599