4×4:00min as many rounds as possible-record all scores 0:00-4:00 3 pull-up 6 push-up 9 squats 4:00-8:00 4 pull-up 7 push-up 10 squats 8:00-12:00 5 pull-up 8 push-up 11 squats 12:00-16:00 6 pull-ups 9 push-ups 12 squats then,