6. Supermans
Nope, this one won’t fly with me, either (pun intended). As Arnold (yes, the Arnold) explains, this exercise allows a very small range of motion and you just can’t gradually increase load without hurting yourself. In fact, a wrong posture while doing this routine can often lead to injuries in the lower back.
Solution: Head to the reverse hyperextension machine and make good use of it. This way, you’ll be working your lower back and your glutes both safely and effectively.