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Physical characteristics of male and female mice. (a) Body weight (BW) obtained in male (n = 18) and female (n = 23) mice that participated in the study. (b) Heart weight, (c) quadriceps mass, (d) heart weight to BW and (e) quadriceps to BW ratios in male (n = 9) and female (n = 14) sedentary (non‐exercised) mice. (f) 17‐beta‐estradiol levels measured in the serum obtained from a random sampling of male and female mice (n = 5 each group). *p < 0.05 vs. males
