jackknife sit-up
- Target
- abs
- Secondary
- hip flexors
- Equipment
- body weight
- Body part
- waist
Instructions
- 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.
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