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https://hdl.handle.net/2440/3106
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Type: | Journal article |
Title: | Measuring performance during the menstrual cycle: A model using oral contraceptives |
Author: | Redman, Leanne Maree Weatherby, Robert |
Citation: | Medicine and Science in Sports and Exercise, 2004; 36 (1):130-136 |
Publisher: | Lippincott Williams & Wilkins |
Issue Date: | 2004 |
ISSN: | 0195-9131 |
Statement of Responsibility: | Redman L.M. and Weatherby R.P. |
Abstract: | Purpose: The aim of the study was to use a low-dose contraceptive (OC) pill to generate consistent estrogen and progestogen concentrations and investigate the relationship between steroid hormone concentrations during the OC cycle and anaerobic performance. Methods: Five female rowers taking a low-dose OC performed tests of anaerobic power (10-s all-out effort) and capacity (1000-m row) on the Concept IIC rowing ergometer at two time points in each of three OC cycles. These time points corresponded to high estrogen and high progestogen (pill day 16-18; TDH) and low estrogen and low progestogen (pill day 26-28; TDL). Blood samples were collected at rest and postexercise for the quantification of 17ß-estradiol (E2), progesterone (P4), glucose, triglyceride, and lactate concentrations. Results: Endogenous E2 and P4 concentrations were not significantly different between testing days or OC cycles (P > 0.05). Peak power output was higher (P < 0.05) and 1000-m rowing ergometer time faster (P < 0.05) at TDL. Pre- and postexercise glucose concentrations were increased (P < 0.05) at TDL, whereas rest and postexercise plasma triglyceride concentrations were significantly (P < 0.05) lower during this time. Conclusions: This study found that alterations in anaerobic performance throughout the OC cycle occurred with improved performances corresponding to low estrogen and progestogen concentrations. The OC provided a consistent hormonal milieu reducing inter- and intra-individual variations in sex steroids and standardized all performance and metabolic variables across each OC cycle tested. Given that OC use has a high prevalence among female athletes and provides a controlled hormonal environment, it serves as a good model in which the acute effects of female sex steroids on exercise performance can be studied. |
Keywords: | Hormone stéroïde sexuelle ; Hormone ovarienne ; Oestrogène ; Sport ; Sportif ; Femelle ; Homme ; Aviron ; Métabolisme ; Progestérone ; Estradiol ; Voie orale ; Contraceptif ; Cycle menstruel ; Performance physique ; |
DOI: | 10.1249/01.MSS.0000106181.52102.99 |
Description (link): | http://www.ncbi.nlm.nih.gov/pubmed/14707778 |
Appears in Collections: | Molecular and Biomedical Science publications |
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