抄録
Previously we and others reported enhanced sweat rate (SR) during passive cycling (PC) after moderate exercise. This response may have occurred due to a combination of accumulated metabolites coupled with mechanoreceptor stimulation. To test whether accumulated metabolites associated with dynamic exercise contribute to this response, 6 healthy males performed 15-minute bouts of supine right leg exercise on a tandem cycle ergometer (1.5 kpm at 50 rpm). Following this exercise bout, subjects performed one of the following conditions for 5 minutes per condition; 1) stopped exercise (NC), 2) PC of the exercised leg (PR), and 3) PC of the non-exercised leg (PL). These protocols were randomly assigned with at least 30 min rest between bouts. PC was accomplished via a second person cycling the tandem ergometer, which allows for mechanical stimulation of the muscle with minimal activation of central command. One-leg exercise increased heart rate, mean arterial pressure (MAP), esophageal temperature and SR. At the end of exercise there were no significant differences in these parameters among the exercise bouts. SR was greater during both PR and PL bouts relative to NC bout, although no significant difference was observed between PR and PL conditions. These results suggested that accumulated metabolites in the active muscle are unlikely to contribute to the enhanced sweating during mechanical stimulation following moderate exercise. [J Physiol Sci. 2006;56 Suppl:S229]
