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

我们评估了对老年人热egulatory response的影响，分析了与峰值有氧能力（VO_<2，峰值> ）和血液体积（ BV ）中变化相关的结果。Twenty male subjects （ age， 64± 1 yr; VO_<2， peak>， 32.8± 1.2 ml·kg^\-1>·min^\-1>， mean±SE ） were divided into 3 traManagement regimens for 18 weeks; control （ C， n=7 ）， aerobic traManagement（ AT， n=8 ）， and resistance traManagement（ RT， n=8 ）。在C中，被允许每天散步10，000步，每周6 - 7天。在50- 75%VO_<2，峰值>在60分钟的一天， 3天的一周，在50- 75%的周期内进行测试的主题是步行。在RT中进行了抵抗运动，包括60- 80%的膝关节延长和柔韧性， 2-3套8次重复，一天，一周3天，一次步行。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.此外，在<es>30℃下，对皮肤老化和出汗进行30分钟测定，在30℃下测定60%VO_&lt;2，峰值&gt;的生理温度（T_）阈值，增加在AT （ p&lt;0.05 ）和RT （ p&lt;0.05 ），但不在C （ P&gt; 0.0 x）。在对比度下，前方皮肤血管状况/T_<es>和Sweat rate/T_的<es>斜率，在所有试验中保留了未更改，但在试验中增加了主题，增加了BV的不响应。在老年人身上进行有氧/抵抗训练，增加了VO_&lt;2，峰值&gt;，并且对<es>前皮肤流失和出汗的T_阈值较低，但没有增加BV。进一步，T_<es>与BV大于VO_&lt;2，峰值&gt;相比，皮肤松动和出汗时增加的敏感性的增加。

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>.