Menstrual cycle: No effect on exercise cardiorespiratory variables or blood lactate concentration

被引:65
作者
Smekal, Gerhard
Von Duvillard, Serge P.
Frigo, Peter
Tegelhofer, Tina
Pokan, Rochus
Hofmann, Peter
Tschan, Harald
Baron, Ramon
Wonisch, Manfred
Renezeder, Karin
Bachl, Norbert
机构
[1] Texas A&M Univ, Dept Hlth & Human Performance, Human Performance Lab, Commerce, TX 75429 USA
[2] Univ Vienna, Dept Obstet & Gynecol, Vienna, Austria
[3] Univ Vienna, Dept Sport Physiol, Inst Sports Sci, Vienna, Austria
[4] Karl Franzens Univ Graz, Inst Sport Sci, A-8010 Graz, Austria
[5] Karl Franzens Univ Graz, Human Performance Res Ctr, A-8010 Graz, Austria
[6] Med Univ Graz, Graz, Austria
[7] Graz Univ, Dept Internal Med, Graz, Austria
关键词
female hormones; sex hormones; respiratory gas-exchange measures; threshold;
D O I
10.1249/mss.0b013e31805371e7
中图分类号
G8 [体育];
学科分类号
04 ; 0403 ;
摘要
Purpose: Numerous investigations have reported changes in metabolic and cardiorespiratory responses associated with the menstrual cycle. We examined whether variables commonly used in exercise testing are influenced by menstrual cycle phases. Methods: Nineteen eumenorrheic women performed two incremental tests to voluntary exhaustion on a cycle ergometer during two different phases of the menstrual cycle: the follicular phase (FP) and the luteal phase (LP). Our study variables were power output, VO2, HR, V-E, RER, ventilatory equivalents of oxygen (V-E/VO2) and carbon dioxide (V-E/VCO2 and blood lactate concentration (LA) and were measured at rest, at exhaustion, and at different thresholds of aerobic and anaerobic metabolism. The threshold determination consisted of a three-phase model with two lactate turnpoints (LTP1, LTP2) and a three-phase model with two respiratory thresholds: the anaerobic threshold (AT) and the respiratory compensation point (RCP). Results: When comparing power output, VO2, LA, HR, and RER, we found no significant differences between FP and LP at rest, at maximal load, at any selected threshold, or any stage of the incremental tests. We observed higher values for V-E/VO2, VEVCO2, and V-E at rest, at exhaustion, and at our AT in LP. Conclusion: We did not find performance changes associated with menstrual cycle. Our data do not support findings that the menstrual cycle influences lactate 'thresholds' and ventilatory 'thresholds.' In agreement with other studies, we observed a higher ventilatory drive in the LP compared with the FP of the menstrual cycle.
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页码:1098 / 1106
页数:9
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