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How to do it
- Lie face up on a mat with your arms out to the sides, palms down, for balance.
- Lift your feet and raise the knees until they sit directly over the hips, still bent about ninety degrees.
- Brace the abdominals and press the lower back toward the mat before the first repetition.
- Exhale and roll the hips toward the ribcage so the knees travel toward the head.
- Pause at the top without changing the knee angle or swinging the legs.
- Inhale and lower the hips back until the pelvis and spine rest on the mat, keeping the feet off the floor.
Common mistakes
- Swinging the legs and riding momentum instead of curling the pelvis with the abdominals.
- Changing the knee angle during the roll, which turns the drill into a hip-flexor kick.
- Letting the feet drop to the floor between repetitions, which resets the tension every rep.
- Dropping the hips back down rather than resisting the descent, which discards the eccentric.
Muscles worked
- Primary
- Abs
Good to know
- What muscles does the Reverse Crunch work?
- Mainly the abs.
- What equipment do you need for the Reverse Crunch?
- None. It is a bodyweight exercise.
- Is the Reverse Crunch good for beginners?
- GymVim rates it intermediate. For a beginner-rated exercise on the same muscle and movement, see the Bird Dog.