Currently, I'm exercising 3 days a week (every other day), each day doing 2-3 muscle groups. Currently, my goal is to increase muscle mass. My question is, given my exercise goal, is it better to ...
Why are rest days important? When the weather permits, I jog (or otherwise work-out) every day, but people often tell me I should not, because rest days are important. What is the rationale behind ...