Crunch (on Stability Ball, Arms Straight)
Targets Abs / Core (also Hip Flexors, Obliques). Requires Stability Ball. Part of the Iron Roulette™ full-body workout program — spin the bull for a random, gear-aware gym move.
Equipment
Iron Roulette only spins this move when your gym bag includes every piece of gear it needs.
How to
- Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
- Lie back on the ball until your lower back is supported and your upper body is parallel to the…