| Exercise performance and ventilatory response in the menstrual cycle. | |
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MedLine Citation:
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PMID: 3574043 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We investigated the effects of the luteal phase of the menstrual cycle, as compared with the follicular phase, on ventilatory response (VR) and exercise performance in eight normally menstruating, non-athletic women. Subjects were studied near the predicted mid-point of each phase which was later documented by serum progesterone level. Resting VR to hypercapnia was greater, and VR to hypoxia tended to be greater in the luteal phase than in the follicular phase, but the increases in VRs were unrelated to progesterone level. There were no differences in maximal oxygen uptake, maximal duration of exercise, maximal heart rate, work efficiency, maximal ventilation (VE), anaerobic (ventilatory) threshold, gas exchange, cardiac output, or oxygen delivery. The PaCO2 was lower, and pHa tended to be higher during exercise. VE per unit CO2 output (VE/VCO2) was increased. R values (VCO2/VO2) were less, and maximal lactate values tended to be less, suggestive of increased dependence on fat for energy metabolism. At a given workload, exercise VE was unchanged due to the effect of less CO2 output at a given VO2 (lower R), balancing increased VE/VCO2. We conclude that, although ventilatory parameters are altered by the menstrual cycle, there is no overall effect on maximal exercise performance. |
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Authors:
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M L Dombovy; H W Bonekat; T J Williams; B A Staats |
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6787563 - Analysis of alveolar pco2 control during the menstrual cycle. 1457113 - The effect of respiratory alkalosis on oxygen consumption in anesthetized patients. 1549003 - J.b. wolffe memorial lecture. "why exercise?". |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: 19 ISSN: 0195-9131 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 1987 Apr |
Date Detail:
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Created Date: 1987-06-02 Completed Date: 1987-06-02 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 111-7 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Gas Analysis Cardiac Output Female Follicular Phase* Humans Luteal Phase* Physical Exertion* Progesterone / blood Pulmonary Gas Exchange* |
| Grant Support | |
ID/Acronym/Agency:
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HL-21584/HL/NHLBI NIH HHS |
| Chemical | |
Reg. No./Substance:
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57-83-0/Progesterone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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