What are the differences in muscle growth between males and females? For a long time, we believed that males had an easier time gaining muscle compared to females due to the ~10x higher endogenous testosterone levels. We’d make statements such as, “Women can’t get bulky because we don’t have enough testosterone!” As it turns out, testosterone levels are more responsible for differences in baseline muscle mass in adult males vs. females. However, when it comes to actual muscle growth, there are n