EFFECTS OF EXERCISE TRAINING ON THERMOREGULATORY RESPONSES AND BLOOD VOLUME IN OLDER MEN

我们对aerobic的影响（resistance training on thermoregulatory responses in older men）and analyzed the results in relation with changes in peak aerobic capacity (vo_ <2，blood volume (BV). Twenty male subjects (age, 64±1yr；v_c <2, peak>, 32.8±1.2ml·kg^<-1>·min^<-1>，mean±SE) were divided into 3 training regimens for 18 weeks；control (C, n=7), aerobic training (AT, n=8), and resistance training (RT，n=8). Subjects in C were allowed to perform a walking of ~ 10,000 steps a day，6 ~ 7days a week. Subjects in AT exercised on a cycle ergometer AT 50-75 % v_ <2，peak> for 60 min a day, 3 days a weekbesides the walking. Subjects in RT performed a resistance exercise包括knee extension andflexion at 60-80 % of 1rm, 2-3 sets of 8 repetitions a day, 3 days a week，besides the walking. After training, v_c <2, peak> increased by 3.1±4.6% in C (n.s.)，in a 14.3±百分之二点四(p < .1), and in r八点四±百分之二点九(p < .5),but BV remained unchanged in all trials. Also，the esophageal temperature (t__ <es>) thresholds for forearm skin vasodilation and sweating，determined during 30-min exercise of 60 % v_c <2, peak> at 30℃，increased in AT (p<0.05) and RT (p<0.05) but not in C (p >0.0x). in contrast，the slopes of forearm skin vascular conductance/ t_ <es> and sweat rate/ t_ <es>，remained unchanged in all trials，but increased in subjects with increased BV irrespective of trials. Thus，aerobic/ resistance training in older men increased vo_ <2，peak> and lowered t_ <es> threshold for forearm skin vasodilation and sweating，but did not increase BV. Further，the sensitivity of increase in skin vasodilation and sweating at a given increase in t_ <es> was moreassociated with BV than vo_c <2, peak>。

We assessed the effects of aerobic/ resistance training on thermoregulatory responses in older men and analyzed the results in relation with changes in peak aerobic capacity ( VO_<2, peak> ) and blood volume ( BV ). Twenty male subjects ( age, 64±1yr; VO_<2, peak>, 32.8±1.2ml・kg^<-1>・min^<-1>, mean±SE ) were divided into 3 training regimens for 18 weeks; control ( C, n=7 ), aerobic training ( AT, n=8 ), and resistance training ( RT, n=8 ). Subjects in C were allowed to perform a walking of 〜10,000 steps a day, 6〜7days a week. Subjects in AT exercised on a cycle ergometer at 50-75 % VO_<2, peak> for 60 min a day, 3 days a week, besides the walking. Subjects in RT performed a resistance exercise including knee extension and flexion at 60-80 % of 1RM, 2-3 sets of 8 repetitions a day, 3 days a week, besides the walking. After training, VO_<2, peak> increased by 3.1±4.6% in C ( n.s. ), 14.3±2.4% in A ( p<0.01 ), and 8.4±2.9 % in R( p<0.05 ), but BV remained unchanged in all trials. Also, the esophageal temperature ( T_<es> ) thresholds for forearm skin vasodilation and sweating, determined during 30-min exercise of 60 % VO_<2, peak> at 30℃, increased in AT ( p<0.05 ) and RT ( p<0.05 ) but not in C ( P>0.0x ). In contrast, the slopes of forearm skin vascular conductance/ T_<es> and sweat rate/ T_<es>, remained unchanged in all trials, but increased in subjects with increased BV irrespective of trials. Thus, aerobic/ resistance training in older men increased VO_<2, peak> and lowered T_<es> threshold for forearm skin vasodilation and sweating, but did not increase BV. Further, the sensitivity of increase in skin vasodilation and sweating at a given increase in T_<es> was more associated with BV than VO_<2, peak>.