Giant Sets: The Best Thing You Aren't Doing to Gain Muscle and Burn Fat

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9. Stability Ball Hamstring Curl: 12 reps

  • Lay on the ground in front of a stability ball, keeping your hips close to the ball and your heels on top of it.
  • Drive your heels through the ball and raise your hips up until they're fully extended.
  • With hips extended, allow legs to extend, maintaining full hip extension.
  • Curl your feet and legs back in toward your hips, keeping hips up in full extension the whole time.
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