Reverse Crunch
Muscles worked
Instructions
- 1Lie down on the floor with your legs fully extended and arms to the side of your torso with the palms on the floor. Your arms should be stationary for the entire exercise.
- 2Move your legs up so that your thighs are perpendicular to the floor and feet are together and parallel to the floor. This is the starting position.
- 3While inhaling, move your legs towards the torso as you roll your pelvis backwards and you raise your hips off the floor. At the end of this movement your knees will be touching your chest.
- 4Hold the contraction for a second and move your legs back to the starting position while exhaling.
- 5Repeat for the recommended amount of repetitions.
table_chartRecommended sets and reps
These ranges vary depending on your training goal — adjust the load accordingly.
| Goal | Sets | Reps | Rest |
|---|---|---|---|
| Strength | 3–4 | 6–8 | 2–3 min |
| Hypertrophy | 3–4 | 10–15 | 60 s |
| Endurance | 2–3 | 15–20 | 30–45 s |
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About Reverse Crunch
The reverse crunch flips the logic of the classic crunch: here the hips and pelvis rise toward the chest while the upper body stays on the floor. Lying down with knees bent, you curl the pelvis upward, lifting the glutes, then lower under control. This bodyweight movement emphasises the lower rectus abdominis, often neglected by the standard crunch. It also avoids neck strain, since the head stays down. Performed without momentum, it is an excellent exercise for beginners and advanced lifters alike.
check_circleBenefits
- check_circleEmphasizes the lower rectus abdominis through pelvic curl
- check_circleLittle neck strain compared with the classic crunch
- check_circleNeeds no equipment, ideal for training at home
- check_circleExcellent complement to the classic crunch to cover the whole abdominal region
- check_circleNatural progression toward more advanced moves like the leg raise
lightbulbExecution tips
- lightbulbCurl the pelvis upward instead of swinging the legs
- lightbulbLift the glutes slightly off the floor on each rep
- lightbulbKeep the thighs close to the chest throughout
- lightbulbLower the pelvis slowly instead of dropping suddenly
- lightbulbPlace the hands under the glutes to stabilize the lower back if needed
warningCommon mistakes
- warningUsing leg momentum instead of the ab contraction
- warningFailing to lift the pelvis and only moving the legs
- warningGoing too fast and bouncing off the floor
- warningArching the lower back instead of curling the spine
- warningFlexing the hips only from the feet without engaging the abs
tuneVariations and alternatives
- tuneDecline reverse crunch – head lower than the hips, increases resistance from gravity.
- tuneStraight-leg reverse crunch – increases the lever and difficulty once the bent-knee version is mastered.
- tuneHanging reverse crunch – on a pull-up bar, combines the pelvic curl with a grip challenge.
- tuneReverse crunch on a swiss ball – adds an instability component by resting the upper back on a ball.
- tuneLow-pulley reverse crunch – adds ankle resistance for real progressive overload.
person_checkWho it's for and level
The reverse crunch suits all levels, from the beginner discovering lower-ab training to the seasoned lifter who uses it alongside a heavier exercise. It particularly suits those who feel neck discomfort with the classic crunch, since the head stays down throughout. It's also a good choice for people returning to training, thanks to its low starting intensity that scales with range of motion. Advanced lifters can progress to the straight-leg or hanging version to keep overloading the movement. Coaches often recommend it for light trunk rehab work, subject to medical clearance. It nicely complements a program more focused on the upper abs, for balanced development of the whole region.
shieldSafety and precautions
The reverse crunch stays generally safe, provided you avoid swinging the legs with momentum, which shifts strain toward the lower back rather than the abs. Always keep the movement slow and controlled, especially on the way down. People with lower-back pain should limit the range and avoid arching the back at the end of the descent. If discomfort appears in the lower back, reduce the range or temporarily switch to an assisted version with the hands under the glutes. Never try to touch the floor behind the head with the knees, the useful range stops well before that point. Steady, unbroken breathing helps maintain good control throughout the set.
calendar_monthWhere to place it in your program
Place the reverse crunch at the end of an ab session, after an upper-ab exercise like the classic crunch, for 3 sets of 12 to 20 controlled reps. It pairs very well with a rotational exercise like the Russian twist to cover the whole abdominal region in the same session. Progress to the straight-leg or hanging version once 20 strict reps become easy, rather than stretching the sets further. Two to three sessions a week are enough to progress well. On longer sets, hold a brief pause at the top of each rep to maximize the contraction rather than rushing through. Regularly reassess your range of motion, it tends to improve as overall core strength develops.
helpFrequently asked questions
How is it different from a normal crunch?
The classic crunch curls the upper trunk, while the reverse crunch rolls the pelvis up to target the lower abs.
How many reps should I do?
Aim for 12 to 20 controlled reps focusing on the pelvic curl.
How do I avoid using momentum?
Lower slowly over 2 to 3 seconds and initiate from the pelvis rather than the legs. If you swing, the range or load is too big: reduce it and focus on curling the lower back.
Can I do the reverse crunch with straight legs?
It's possible but harder; start with bent knees to properly master the pelvic curl.
Can the reverse crunch replace the hanging leg raise?
It's a good floor-based alternative, less demanding on grip, though with a slightly more limited range.
Can the reverse crunch be done hands-free, with no support?
Yes, that's the standard version; hands flat on the floor mainly help stabilize the torso if needed.
Is it suitable after pregnancy?
With medical clearance and no active diastasis recti, it's a good low-impact exercise to gently resume ab training.
Can I combine it with a plank in the same session?
Yes, one trains dynamically and the other isometrically, covering two different qualities of core bracing.
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