Regulation of blood volume during training in post-menopausal women.

摘要: UNLABELLED In younger people the increase in aerobic capacity following training is related, part, to blood volume (BV) expansion and consequent improvements maximal cardiac output. This training-induced hypervolemia associated with a decrease cardiopulmonary baroreflex (CPBR) control of peripheral vascular tone. PURPOSE To test hypothesis that improvement peak oxygen consumption (VO2peak) during older women specific central adaptations, such as BV reduction CPBR METHODS Seventeen healthy were randomized into (N = 9, 71 +/- 2 yr) 8, 73 3 groups. The group exercised three four times per wk for 30 min at 60% heart rate 12 then 40-50 75% wk. participated yoga exercises over same time period. We measured resting (Evans blue dye), VO2peak, forearm resistance response unloading low pressure mechanoreceptors levels lower body negative (through -20 mm Hg) before after training. slope (response) unit venous (stimulus) was used assess responsiveness. RESULTS Aerobic increased VO2peak 14.2% from 24.2 mL x kg(-1) min(-1) 27.7 (P < 0.05), smaller than typically seen subjects. Blood (59.9 1.9 60.9 kg[-1]) function (-3.98 0.92 -3.46 0.94 units mm(-1) similar CONCLUSIONS These data indicate inability induce adaptations may limit women. addition, absence these contribute relatively poor short (10-12 wk) periods