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Sahar Mohseni-Takalloo, Sara Beigrezaei, Zeinab Yazdanpanah, Seyede Hamide Rajaie, Sepideh Soltani, Tayebeh Zohrabi, Mojtaba Kaviani, Scott C Forbes, Julien S Baker, and Amin Salehi-Abargouei


There is no consensus of opinion if exercise beneficially affects sex hormones if added to weight-loss diets. The purpose of this study was to perform a systematic review and meta-analysis of controlled clinical trials to evaluate the effect of adding exercise to a hypo-caloric diet during a weight-loss program, on serum testosterone, estradiol, and sex hormone-binding globulin (SHBG) in adults with overweight/obesity.


Systematic review and meta-analysis of the literature.


Online databases including PubMed/MEDLINE, EMBASE, Scopus, ISI Web of Science, and Google Scholar were searched up to April 2021. A random-effects model was applied to compare mean changes in sex hormones and SHBG between participants undergoing a hypo-caloric diet with or without exercise.


In total, 9 eligible clinical trials with 462 participants were included. Out of these, seven, three, and four studies illustrated changes in testosterone, estradiol, and SHBG, respectively. The meta-analysis revealed that exercise had no significant effect on circulating testosterone (WMD = −0.03 nmol/L, 95% CI: −0.11, 0.06, P = 0.51), estradiol (WMD = −0.46 pg/mL, 95% CI: −1.57, 0.65, P = 0.42), and SHBG (WMD = 0.54 nmol/L, 95% CI: −2.63, 3.71, P = 0.74) when added to low-calorie diets.


The addition of exercise to a hypo-caloric diet provided no additional improvement in sex hormone profiles. Further, well-designed randomized controlled trials with longer follow-up periods in both sexes are recommended to confirm and expand the current results.