Reverse Crunch
How to do it
Starting position
- Lie comfortably on your back on the floor
- Place your arms on the floor by your sides
- Bend your knees and lift your legs into the air
- Keep your thighs perpendicular to the floor
Movement
- Engage your abs and contract your lower abs
- Slowly pull your pelvis toward your chest
- Do not let your lower back arch when lowering your legs
Breathing
Exhale as you lift your hips and inhale as you return to the starting position
Trainer tips
- Curl your knees up toward your chest
- Lift your pelvis off the floor
- Don't arch your lower back as you lower
Cautions
- If your lower back comes too far off the floor, it can cause pain, so maintain tension in your abs
- If you use momentum, it strains your lower back, so move slowly
- Swinging using only leg momentum
- Moving only the legs without lifting the pelvis
If you feel pain during the exercise, stop. If it continues, talk to a professional.
Exercise info
| Primary muscles |  Abs |
|---|---|
| Secondary muscles | Obliques · Quads |
| Equipment |  Bodyweight |
| Movement pattern | Core |
| Rep range | 12–20 reps |
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This information is based on our analysis of public content from evidence-based training experts in Korea and abroad. It is not a substitute for medical advice.
Weights and sets differ from person to person. The GYMKC app uses the sets you log to calculate the weight and reps for your next set.