Exercises / Waist / Jackknife Sit-Up
Jackknife Sit-Up
Jackknife Sit-Up: step-by-step technique, the muscles it works and a demo clip. Equipment: body only. Level: beginner.
- Equipmentbody only
- Levelbeginner
- Forcepull
- Typecompound
- Body partwaist
- Primary muscles
- abs, hip flexors
- Secondary muscles
- —
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How to do it
- Lie flat on your back with your legs extended and your arms overhead.
- Engage your core and lift your legs and upper body simultaneously, reaching your hands towards your toes.
- Pause for a moment at the top, then slowly lower your legs and upper body back down to the starting position.
- Repeat for the desired number of repetitions.