For this ab wheel variation, which takes a step up in difficulty, you'll simply elevate your knees on a raised surface, such as a mat. "This increases the range of motion of the ab wheel rollout and in return, creates a more challenging position to stabilize and resist extension," Eric and Ryan told POPSUGAR.
- Kneel on your knees on a raised surface, such as stacked mats, holding the ab wheel directly beneath your shoulders.
- Roll the ab wheel forward slowly, engaging your core as you do. Roll forward until your arms are fully outstretched and your back is flat.
- Use your core to pull your arms back in, rolling slowly back to the starting position.
- This completes one rep.
