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Jackknife sit-up

Jackknife sit-up

The jackknife sit-up is a bodyweight exercise targeting the abdominal muscles. It involves simultaneously lifting the legs and upper body to meet in the middle, engaging the core and hip flexors.

The jackknife sit-up is a bodyweight exercise targeting the abdominal muscles. It involves simultaneously lifting the legs and upper body to meet in the middle, engaging the core and hip flexors.

The jackknife sit-up is a bodyweight exercise targeting the abdominal muscles. It involves simultaneously lifting the legs and upper body to meet in the middle, engaging the core and hip flexors.

How to Do the Jackknife sit-up

How to Do the Jackknife sit-up

How to Do the Jackknife sit-up

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.

Difficulty

Intermediate

Category

Strength

Target Muscle

Abs

Abs

Secondary Muscles

hip flexors

Equipment

Body weight

Body Part

Waist

Related Exercises

Related Exercises

3/4 sit-up

45° side bend

Air bike

Alternate heel touchers

Arm slingers hanging bent knee legs

Arm slingers hanging straight legs

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Coming soon to iPhone. Get notified when we launch.