BACKGROUND: Our objective was to perform a systematic review and meta-analysis of the research literature that compared muscle strength in postmenopausal women who were and were not on estrogen-based hormone therapy (HT). METHODS: Twenty-three relevant studies were found. Effect sizes (ESs) were calculated as the standardized mean difference, and meta-analyses were completed using a random effects model. RESULTS: HT was found to result in a small beneficial effect on muscle strength in postmenopausal women (overall ES = 0.23; p = .003) that equated to an approximately 5% greater strength for women on HT. Among the 23 studies, various muscle groups were assessed for strength, and those that benefitted the most were the thumb adductors (ES = 1.14; p < .001). Ten studies that compared muscle strength in rodents that were and were not estradiol deficient were also analyzed. The ES for absolute strength was moderate but not statistically significant (ES = 0.44; p = .12), whereas estradiol had a large effect on strength normalized to muscle size (ES = 0.66; p = .03). CONCLUSION: Overall, estrogen-based treatments were found to beneficially affect strength.
BACKGROUND: Our objective was to perform a systematic review and meta-analysis of the research literature that compared muscle strength in postmenopausal women who were and were not on estrogen-based hormone therapy (HT). METHODS: Twenty-three relevant studies were found. Effect sizes (ESs) were calculated as the standardized mean difference, and meta-analyses were completed using a random effects model. RESULTS: HT was found to result in a small beneficial effect on muscle strength in postmenopausal women (overall ES = 0.23; p = .003) that equated to an approximately 5% greater strength for women on HT. Among the 23 studies, various muscle groups were assessed for strength, and those that benefitted the most were the thumb adductors (ES = 1.14; p < .001). Ten studies that compared muscle strength in rodents that were and were not estradiol deficient were also analyzed. The ES for absolute strength was moderate but not statistically significant (ES = 0.44; p = .12), whereas estradiol had a large effect on strength normalized to muscle size (ES = 0.66; p = .03). CONCLUSION: Overall, estrogen-based treatments were found to beneficially affect strength.
Authors: Lindsay M Wohlers; Sean M Sweeney; Christopher W Ward; Richard M Lovering; Espen E Spangenburg Journal: J Cell Biochem Date: 2009-05-01 Impact factor: 4.429
Authors: Shaojuan Lai; Brittany C Collins; Brett A Colson; Georgios Kararigas; Dawn A Lowe Journal: Am J Physiol Endocrinol Metab Date: 2016-03-08 Impact factor: 4.310
Authors: Samar R El Khoudary; Candace K McClure; Trang VoPham; Carrie A Karvonen-Gutierrez; Barbara Sternfeld; Jane A Cauley; Naila Khalil; Kim Sutton-Tyrrell Journal: J Gerontol A Biol Sci Med Sci Date: 2014-01-24 Impact factor: 6.053