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Hollow Hold to Jackknife

  • Get your heart rate up with this great jackknife hold!
  • Lying on the ground with your back on the floor, stretch your arms out over your head Keeping your limbs straight, activate your core and crunch so your shoulders and legs lift off the ground.
  • Hold for 5 seconds, then lower and repeat
  • Add Hollow Hold to Jackknife to a pocketrocket.fit custom workout for free!