Five rounds, each for time of:
20 Pull-ups 30 Push-ups 40 Sit-ups 50 Squats
Rest precisely five minutes between each round. Post time for each of five rounds to comments. E.G., 3:30, 4:10, 5:05, 6:18, 7:51
A sit-up on the glute-ham developer becomes easier as the hip angle decreases. A length of rubber tubing can be used to reverse this.