Glucose kinetics and exercise performance during phases of the menstrual cycle: effect of glucose ingestion

被引:0
作者
Campbell, SE [1 ]
Angus, DJ [1 ]
Febbraio, MA [1 ]
机构
[1] Univ Melbourne, Dept Physiol, Exercise Physiol & Metab Lab, Parkville, Vic 3010, Australia
来源
AMERICAN JOURNAL OF PHYSIOLOGY-ENDOCRINOLOGY AND METABOLISM | 2001年 / 281卷 / 04期
关键词
estrogen; progesterone; carbohydrate metabolism; endurance exercise;
D O I
暂无
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To study the effect of menstrual cycle phase and carbohydrate ingestion on glucose kinetics and exercise performance, eight healthy, moderately trained, eumenorrheic women cycled at 70% of peak O-2 consumption for 2 h and then performed a 4 kJ/kg body wt time trial. A control (C) and a glucose ingestion (G) trial were completed during the follicular (F) and luteal (L) phases of the menstrual cycle. Plasma substrate concentrations were similar before the commencement of exercise. Glucose rates of appearance and disappearance were higher (P < 0.05) during the 2nd h of exercise in FC than in LC. The percent contribution of carbohydrate to total energy expenditure was greater in FC than in LC, and subjects performed better (13%, P < 0.05) in FC. Performance improved (19% and 26% in FG and LG compared with FC and LC, respectively, P < 0.05) with the ingestion of glucose throughout exercise. These data demonstrate that substrate metabolism and exercise performance are influenced by the menstrual cycle phase, but ingestion of glucose minimizes these effects.
引用
收藏
页码:E817 / E825
页数:9
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