Swiss-ball Jackknife

Core Training Exercises Hits: 1386

Assume a pushup position with your arms completely straight.

Rest your shins on a Swiss ball.

Your body should form a straight line from your head to your ankles.

Without changing your lower-back posture, roll the Swiss ball toward your chest by pulling it forward with your feet.

Pause, then return the ball to the starting position by lowering your hips and rolling the ball backward. 

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