For time:
50 Back Extensions
50 Sit-ups
40 Back Extensions
40 Sit-ups
30 Back Extensions
30 Sit-ups
20 Back Extensions
20 Sit-ups
10 Back Extensions
10 Sit-ups
Post time to comments.
If a glute-ham developer is not available, do the sit-ups on the ground and substitute good mornings for the back extensions.