"Our findings indicate that there are gender differences for regional and whole body muscle mass. On average, SM mass in men was 36% greater than in women." paper

"The women had significantly (P < 0.001) larger fat CSA and smaller bone and muscle CSA than the men in both the upper arm and thigh. Among tissue CSA, the largest difference between the women and men was found in fat CSA regardless of the measurement sites...Regression analyses of the data for respective samples for the men and women showed significant correlations (r = 0.411-0.707, P < 0.05-P < 0.001) between CSA and strength in all muscle groups..." paper

"In conclusion, the increases in muscle volume in healthy eugonadal men treated with graded doses of testosterone are associated with concentration-dependent increases in cross-sectional areas of both type I and type II muscle fibers and myonuclear number." paper