With a continuously running clock, squat for 60 seconds. Subtract the number of squats completed from 60, and do that many pull-ups in minute two. In minute three, squat again, subtracting the number completed from 60. Do that number of push-ups in minute four. Minute five is squatting again, and minute six pull-ups.The pattern is squats, pull-ups, squats, push-ups, squats, pull-ups, etc. The goal is to stay within the workout's formula for as long as possible. Don't do more than 60 squats in any round.

1st round 45 squats - 15 pull-ups
2nd round 30 squats - 30 push-ups
3rd round 32 squats - 10 pull-ups
4th round 27 squats - 25 push-ups
5th round 20 squats - 10 pull-ups
6th round 25 squats - 20 push-ups