Document Detail

Effects of supra-physiological changes in human ovarian hormone levels on maximum force production of the first dorsal interosseus muscle.
MedLine Citation:
PMID:  15572462     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to investigate the effects of supra-physiological changes in ovarian hormone levels on maximum force production in two conditions, one physiological (pregnancy) and one pseudo-physiological (in vitro fertilization (IVF) treatment). Forty IVF patients were tested at four distinct stages of treatment and 35 women were tested during each trimester of pregnancy and following parturition. Maximum voluntary isometric force per unit cross-sectional area of the first dorsal interosseus muscle was measured. Plasma concentrations of total and bioavailable oestradiol and testosterone were measured, in addition to the total concentrations of progesterone and human chorionic gonadotropin. Despite significant changes in the concentrations of total progesterone, 17beta-oestradiol, bioavailable oestradiol and testosterone between phases, strength did not change significantly throughout IVF treatment (1.30+/-0.29, 1.16+/-0.38, 1.20+/-0.29 and 1.26+/-0.34 N mm-2, respectively, in the 4 phases of IVF treatment). Force production was significantly higher during the second trimester of pregnancy than following childbirth (1.33+/-0.20 N mm-2 at week 12 of pregnancy, 1.51+/-0.42 N mm-2 at week 20, 1.15+/-0.26 N mm-2 at week 36 and 0.94+/-0.31 N mm-2 at week 6 postnatal) but was not significantly correlated with any of the hormones measured. These data suggest that extreme changes in the concentrations of reproductive hormones do not affect the maximum force-generating capacity of young women.
Kirsty Jayne Elliott; Nigel Timothy Cable; Thomas Reilly; Victoria Sefton; Charles Kingsland; Michael Diver
Publication Detail:
Type:  Clinical Trial; Controlled Clinical Trial; Journal Article     Date:  2004-11-30
Journal Detail:
Title:  Experimental physiology     Volume:  90     ISSN:  0958-0670     ISO Abbreviation:  Exp. Physiol.     Publication Date:  2005 Mar 
Date Detail:
Created Date:  2005-03-07     Completed Date:  2005-07-05     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9002940     Medline TA:  Exp Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  215-23     Citation Subset:  IM    
Applied Biomedical Sciences Research Group, Kings College London, UK.
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MeSH Terms
Cross-Sectional Studies
Fertilization in Vitro*
Fingers / physiology
Gonadal Steroid Hormones / blood*
Isometric Contraction / physiology*
Muscle, Skeletal / physiology*
Ovary / metabolism*
Physical Exertion / physiology*
Pregnancy / blood*,  physiology*
Reg. No./Substance:
0/Gonadal Steroid Hormones

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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