at some point, i remember reading somewhere (i think in Coach Sommers book) that, optimally, you should only exercise your legs once a week. this is in contrast to your arms which should be exercised 3 to 4 times a week.
a lot of leg movements have an analog in the arms. for example, squats are like handstand pushups. it seems weird that the frequency is different for the legs and the arms.
i was wondering what is the rationale for this difference? is it because the leg exercises recommended are more intense than the arm ones? or is it because they are fast, and the others are slow? or is it just from experience with injuries.