I've been training for some years. Not that I don't wanna build muscle, I just would like an explaination for the large amounts of mass with very little effort...even from running / swimming.

Good day all. I work out 4-6 days per week. I just turned 30 and for years I have been limiting workouts for one main reason...rapid growth of lean body mass! I know it sounds crazy and your asking "how is that a problem". question is how the hell am I getting bigger when I follow a good d...