Crunch (on stability ball, arms crossed)
The Crunch (on stability ball, arms crossed) primarily works the Rectus Abdominis, with secondary activation of the External Obliques. It is a bodyweight isolation exercise at intermediate difficulty.
A bodyweight isolation pull exercise targeting the Rectus Abdominis.
| Equipment | Bodyweight |
|---|---|
| Difficulty | Intermediate |
| Type | Isolation |
| Movement | Flexion |
| Force | Pull |
| Laterality | Bilateral |
| Primary | Rectus Abdominis |
| Secondary | External Obliques |
Muscles Worked
Front
Back
Primary
Secondary
Stabilizer
Primary Muscles
- Primary Muscle Rectus Abdominis (core)
Secondary Muscles
- Secondary Muscle External Obliques (core)
Instructions
- Preparation: Sit on exercise ball. Walk forward on ball and lie back on ball with shoulders and head hanging off and knees and hips bent. Gently hyperextend back on contour of ball. Cross arms on chest. Execution: Flex waist to raise upper torso. Return to original position. Repeat. Comments: Some individuals may experience low back discomfort if hips are not bent so they must use smallerball sizeor lower their hip position on ball. SeeSpot Reduction Myth.
Alternative Exercises
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