Effect of menstrual cycle phase on exercise performance of high-altitude native women at 3600 m
| Autor: | Robert T. Chatterton, Tom D. Brutsaert, Mauricio Araoz, Virginia J. Vitzthum, Hilde Spielvogel, Esperanza Caceres |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Adult
Bolivia medicine.medical_specialty Physiology media_common.quotation_subject Luteal Phase Aquatic Science Luteal phase Oxygen Consumption Internal medicine Follicular phase medicine Humans Exercise physiology Saliva Exercise Molecular Biology Menstrual Cycle Progesterone Ecology Evolution Behavior and Systematics Menstrual cycle media_common Chemistry Altitude VO2 max Effects of high altitude on humans Menstrual cycle phase Endocrinology Follicular Phase Insect Science Breathing Female Animal Science and Zoology Pulmonary Ventilation |
| Zdroj: | Journal of Experimental Biology. 205:233-239 |
| ISSN: | 1477-9145 0022-0949 |
| DOI: | 10.1242/jeb.205.2.233 |
| Popis: | SUMMARY At sea level normally menstruating women show increased ventilation (V̇e) and hemodynamic changes due to increased progesterone (P) and estrogen (E2) levels during the mid-luteal (L) compared to the mid-follicular (F) phase of the ovarian cycle. Such changes may affect maximal exercise performance. This repeated-measures, randomized study, conducted at 3600 m, tests the hypothesis that a P-mediated increase in V̇e increases maximal oxygen consumption (V̇O2max) during the L phase relative to the F phase in Bolivian women, either born and raised at high altitude (HA), or resident at HA since early childhood. Subjects (N=30) enrolled in the study were aged 27.7±0.7 years (mean ± s.e.m.) and non-pregnant, non-lactating, relatively sedentary residents of La Paz, Bolivia, who were not using hormonal contraceptives. Mean salivary P levels at the time of the exercise tests were 63.3 pg ml–1 and 22.9 pg ml–1 for the L and F phases, respectively. Subset analyses of submaximal (N=23) and maximal (N=13) exercise responses were conducted only with women showing increased P levels from F to L and, in the latter case, with those also achieving true V̇O2max. Submaximal exercise V̇e and ventilatory equivalents were higher in the L phase (P |
| Databáze: | OpenAIRE |
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