10 Best Crunch - Legs On Exercise Ball Alternatives for No-Ball Workouts
The Crunch - Legs On Exercise Ball is done lying on your back with a stability ball. Ranked closest by our scoring: Crunches and the Decline Oblique Crunch. Two harder versions, the Crunch (On Stability Ball) and the Arms Straight) Crunch (On Stability Ball, are listed below as progressions rather than swaps.

Each substitute is scored on movement pattern, muscles worked, equipment and body position. Read how we rank alternatives
How to Do the Crunch - Legs On Exercise Ball
The steps for the Crunch - Legs On Exercise Ball itself, so you can judge how close each substitute below really is.
Abdominals · Stability-ball · Intermediate · Isolation
- Lie flat on your back with your feet resting on an exercise ball and your knees bent at a 90 degree angle.
- Place your feet three to four inches apart and point your toes inward so they touch.
- Place your hands lightly on either side of your head keeping your elbows in. Tip: Don't lock your fingers behind your head.
- Push the small of your back down in the floor in order to better isolate your abdominal muscles. This will be your starting position.
- Begin to roll your shoulders off the floor and continue to push down as hard as you can with your lower back. Your shoulders should come up off the floor only about four inches, and your lower back should remain on the floor. Breathe out as you execute this portion of the movement. Squeeze your abdominals hard at the top of the contraction and hold for a second. Tip: Focus on a slow, controlled movement. Refrain from using momentum at any time.
- Slowly go back down to the starting position as you inhale.
- Repeat for the recommended amount of repetitions.
The 10 Best Crunch - Legs On Exercise Ball Alternatives
10 substitutes, ranked by how closely each one matches the Crunch - Legs On Exercise Ball on movement pattern, muscles worked, equipment and body position. The higher the score, the less you change. Cards with a "How to perform it" link open to show the steps; every card title links to that exercise's own alternatives page. Harder versions are tagged as progressions and kept out of the top spot even when they score higher.
Each link re-ranks the list below for the kit it names. Pick one to hide the substitutes you cannot set up.

1. Crunches
98% matchAbdominals · Beginner · Isolation
Use this when you have nothing to train with, because it works the abdominals with bodyweight alone.
- Bodyweight
How to perform it
- Lie flat on your back with your feet flat on the ground, or resting on a bench with your knees bent at a 90 degree angle. If you are resting your feet on a bench, place them three to four inches apart and point your toes inward so they touch.
- Now place your hands lightly on either side of your head keeping your elbows in. Tip: Don't lock your fingers behind your head.
- While pushing the small of your back down in the floor to better isolate your abdominal muscles, begin to roll your shoulders off the floor.
- Continue to push down as hard as you can with your lower back as you contract your abdominals and exhale. Your shoulders should come up off the floor only about four inches, and your lower back should remain on the floor. At the top of the movement, contract your abdominals hard and keep the contraction for a second. Tip: Focus on slow, controlled movement - don't cheat yourself by using momentum.
- After the one second contraction, begin to come down slowly again to the starting position as you inhale.
- Repeat for the recommended amount of repetitions.
Sets and reps: 3 sets of 8 to 12 reps, and add reps before you add load.
Why this matches
- Primary muscle: abdominals, the same as the Crunch - Legs On Exercise Ball
- Equipment: bodyweight only, the same as the Crunch - Legs On Exercise Ball
- Body position: lying on your back, the same as the Crunch - Legs On Exercise Ball
2. Decline Crunch
85% matchAbs · Intermediate · Isolation
A looser match: it works the abs rather than the abdominals.
- Bodyweight
How to perform it
- Lie on a decline bench with your feet secured and your knees bent at a 90-degree angle.
- Place your hands behind your head or across your chest.
- Engage your abs and lift your upper body towards your knees, curling your torso.
- Pause for a moment at the top, then slowly lower your upper body back down to the starting position.
- Repeat for the desired number of repetitions.
Sets and reps: 3 sets of 10 to 15 reps.
Why this matches
- Primary muscle: abs, not abdominals
- Equipment: bodyweight only, the same as the Crunch - Legs On Exercise Ball
- Body position: lying on your back, the same as the Crunch - Legs On Exercise Ball
3. Decline Oblique Crunch
84% matchAbdominals · Intermediate · Isolation
4. Crunch (Hands Overhead)
84% matchAbs · Intermediate · Isolation
5. Crunch Floor
84% matchAbs · Beginner · Isolation
6. Prisoner Half Sit-up
83% matchAbs · Beginner · Isolation
Progression
7. Crunch (On Stability Ball)
83% matchAbs · Intermediate · Isolation
A looser match: it uses the same equipment, but it works the abs rather than the abdominals.
- Stability-ball
How to perform it
- Sit on the stability ball with your feet flat on the ground and your knees bent at a 90-degree angle.
- Lie back on the ball until your lower back is supported and your upper body is parallel to the floor.
- Place your hands behind your head or across your chest.
- Engage your abs and lift your upper body towards your knees, curling your torso forward.
- Pause for a moment at the top of the movement, then slowly lower your upper body back down to the starting position.
- Repeat for the desired number of repetitions.
Sets and reps: 3 sets of 10 to 15 reps.
Why this matches
- Primary muscle: abs, not abdominals
- Equipment: bodyweight only, the same as the Crunch - Legs On Exercise Ball
- Body position: lying on your back, the same as the Crunch - Legs On Exercise Ball
- Balance: harder to stay steady on than the Crunch - Legs On Exercise Ball
9. Cocoons
80% matchAbs · Beginner · Isolation
10. Half Sit-up
78% matchAbs · Beginner · Isolation
Crunch - Legs On Exercise Ball FAQ
What muscles does Crunch - Legs On Exercise Ball work?
The movement primarily targets the rectus abdominis with secondary activation of the obliques and deep stabilizers like the transverse abdominis. The stability ball also requires isometric control from the lumbar extensors and hip flexors to keep the pelvis and legs supported.
What is the best bodyweight alternative to Crunch - Legs On Exercise Ball?
A controlled floor crunch is the best bodyweight substitute: lie supine with knees bent, feet flat, and perform a 2-second concentric curl focusing on spinal flexion of the thoracic spine while keeping the lower back gently pressed to the floor. Cue: exhale and draw the ribs toward the pelvis to maximize rectus engagement.
Find Alternatives for Any Exercise
Search the exercise database and filter the ranked substitutes by the equipment you own.



