K J Elliott1, N T Cable, T Reilly. 1. Applied Biomedical Sciences Research Group, GKT School of Biomedical Sciences, Shepherds House, Guys Campus, London SE1 1UL. kirsty.elliot@kcl.ac.uk [corrected]
Abstract
OBJECTIVE: To examine the effects of oral contraceptive use on maximum force production in young women. METHODS: In the study, 21 female subjects (14 pill users and seven eumenorrheic controls) took part. All pill using subjects had been taking a combined, monophasic oral contraceptive pill for at least 6 months. Maximum dynamic and isometric leg strength, maximum isometric strength of the first dorsal interosseus (FDI) muscle, and plasma concentrations of oestradiol and progesterone were measured on days 7 and 14 of pill consumption and day 5 of pill withdrawal. The eumenorrheic group was tested (FDI strength and hormone concentrations) on days 2 and 21 of the menstrual cycle. RESULTS: There were no significant changes in the concentration of endogenous oestradiol or progesterone or any measure of muscle strength between pill phases (p<0.05). The pill group did not significantly differ from the eumenorrheic group (p<0.05), despite a significant increase in the concentration of progesterone and oestradiol on day 21 of the menstrual cycle compared with day 2 of the menstrual cycle and pill consumption and withdrawal (p<0.05). CONCLUSIONS: These data suggest that oral contraceptive use does not significantly affect muscle strength. Moreover, oral contraceptive users were not stronger or weaker than their eumenorrheic counterparts.
OBJECTIVE: To examine the effects of oral contraceptive use on maximum force production in young women. METHODS: In the study, 21 female subjects (14 pill users and seven eumenorrheic controls) took part. All pill using subjects had been taking a combined, monophasic oral contraceptive pill for at least 6 months. Maximum dynamic and isometric leg strength, maximum isometric strength of the first dorsal interosseus (FDI) muscle, and plasma concentrations of oestradiol and progesterone were measured on days 7 and 14 of pill consumption and day 5 of pill withdrawal. The eumenorrheic group was tested (FDI strength and hormone concentrations) on days 2 and 21 of the menstrual cycle. RESULTS: There were no significant changes in the concentration of endogenous oestradiol or progesterone or any measure of muscle strength between pill phases (p<0.05). The pill group did not significantly differ from the eumenorrheic group (p<0.05), despite a significant increase in the concentration of progesterone and oestradiol on day 21 of the menstrual cycle compared with day 2 of the menstrual cycle and pill consumption and withdrawal (p<0.05). CONCLUSIONS: These data suggest that oral contraceptive use does not significantly affect muscle strength. Moreover, oral contraceptive users were not stronger or weaker than their eumenorrheic counterparts.
Authors: Damien M Callahan; Nicholas G Bedrin; Meenakumari Subramanian; James Berking; Philip A Ades; Michael J Toth; Mark S Miller Journal: J Appl Physiol (1985) Date: 2014-05-01
Authors: John P Abt; Timothy C Sell; Kevin G Laudner; Jean L McCrory; Tammy L Loucks; Sarah L Berga; Scott M Lephart Journal: Knee Surg Sports Traumatol Arthrosc Date: 2007-03-16 Impact factor: 4.114
Authors: Kirsty J Elliott-Sale; Kelly L McNulty; Paul Ansdell; Stuart Goodall; Kirsty M Hicks; Kevin Thomas; Paul A Swinton; Eimear Dolan Journal: Sports Med Date: 2020-10 Impact factor: 11.136