Every 3:00 for 27:00 (9 sets):
Set 1: 5 Back Squats
Set 2: 3 Back Squats
Set 3: 2 Back Squats
Set 4: 5 Back Squats
Set 5: 3 Back Squats
Set 6: 2 Back squats
Set 7: 5 Back Squats
Set 8: 3 Back Squats
Set 9: 2 Back Squats

3x:
15 Weighted Sit Ups