Stability Ball Jackknife
Targets Abs / Core (also Hip Flexors, Shoulders). 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
- Plank on the ball.
- Pike without bending the arms.