CoreReps OnlyRated 4 out of 10

Jackknife Sit-Up

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Animated demonstration of the Jackknife Sit-Up

How to do the Jackknife Sit-Up

  1. 1Lie flat on your back with your arms extended overhead and your legs straight.
  2. 2Simultaneously lift your legs and torso towards each other, aiming to touch your toes with your hands.
  3. 3Engage your core throughout the movement.
  4. 4Slowly lower your legs and torso back to the starting position.

Muscle group

Core

Type

Reps Only

Equipment

None needed

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