Diurnal variations in ventilatory and cardiorespiratory responses to submaximal treadmill exercise in females.

M Giacomoni, T Bernard, O Gavarry, S Altare, G Falgairette
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引用次数: 36

Abstract

Diurnal variations in ventilatory and cardiorespiratory responses to submaximal treadmill exercise were analysed in 11 eumenorrhoeic women and in 10 women using monophasic oral contraceptives. Subjects performed submaximal treadmill exercise at three intensities averaging 7, 8, and 9 km x h(-1), each for 4 min at 0800, 1300 and 1700 hours, assigned randomly on 3 separate days. Rectal temperature was measured before (T(rec(b))) and after (T(rec(a))) exercise. Cardiac frequency (f(c)), ventilation (V(E)), oxygen uptake (VO(2)), carbon dioxide output (VCO(2)), and respiratory exchange ratio (R) were assessed in the last minute of each stage of the exercise. Both T(rec(b)) and T(rec(a)) increased from 0800 to 1700 hours (P < 0.001). For a given submaximal work rate, VO(2) and VCO(2) were higher in the afternoon compared to the morning. Similarly, R was increased at 1700 hours compared to 0800 hours during the recovery period following exercise (P < 0.05). However, V(E) did not vary significantly during the day at any of the running intensities. No significant interactions (group x time of day) were observed in any of the studied parameters. In contrast to ventilation, the VO(2) and VCO(2) of the females during submaximal exercise were both affected by the time of day, without any differences between eumenorrhoeic women and users of oral contraceptives.

女性次极限跑步机运动时通气和心肺反应的日变化。
分析了11名经期妇女和10名使用单相口服避孕药的妇女在进行亚极限跑步机时的呼吸和心肺反应的日变化。受试者进行三种强度的亚极限跑步机运动,平均为7、8和9公里每小时(-1),每次4分钟,分别在0800、1300和1700小时进行,随机分配在3天进行。测量运动前(T(rec(b))和运动后(T(rec(a))的直肠温度。在每个运动阶段的最后一分钟评估心脏频率(f(c))、通气量(V(E))、摄氧量(VO(2))、二氧化碳排出量(VCO(2))和呼吸交换比(R)。从0800到1700小时,T(rec(b))和T(rec(a))均增加(P < 0.001)。对于给定的次最大工作速率,VO(2)和VCO(2)在下午比上午高。同样,运动后恢复期1700小时R较0800小时升高(P < 0.05)。然而,在任何跑步强度下,V(E)在白天都没有显著变化。在任何研究参数中均未观察到显著的相互作用(组x一天中的时间)。与通气相比,女性在亚极限运动时的VO(2)和VCO(2)都受到一天中的时间的影响,而痛经妇女和口服避孕药使用者之间没有任何差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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