Just a little about me,
20yrs, 5'7, 171 lbs.
I want to do cardio while still maintaing muscle mass. I know if you start losing large amounts of weight you lose muscle, but I always watch bodybuilding videos even thought I'm not close to their stature, I was wondering if the whole 20min on a stair climber is what you need to do.
I've been running sprints and sprinting stairs as of late and was wondering if that was okay or whether its too much, if someone could just lead me in the right direction id be grateful.