Start training with only your bodyweight. You will find a highly effective training program developed by experienced trainers using the newest sports science. The routine is focused on building strength. If your diet is in check you will gain muscle mass and lose fat. Do this three times a week, with at least one rest day. Try to beat your previous numbers every workout. You will start doing simple pull-ups, pushups, and squats and as you get stronger you advance to bodyweight movements like th