Jackknife Sit Up

How to perform it

Step-by-step instructions

1. 01Lie on your back with the legs straight, arms extended overhead, and the abdominals braced.
2. 02Lift the legs and torso at the same time while sweeping the arms toward the feet.
3. 03Balance briefly on the pelvis with the hands reaching toward the shins or feet and the legs kept as straight as control allows.
4. 04Keep the neck long and avoid using momentum or pulling the head forward to reach the top.
5. 05Lower the torso, arms, and legs together under control and reset before the next repetition.