Hollow Rock — CrossFit Technique Guide
The hollow rock takes the static hollow hold and turns it into a dynamic gymnastics drill. The athlete maintains the hollow body position while rocking gently backward and forward without losing lumbar contact or body tension. In CrossFit gymnastics, hollow rocks teach athletes how to keep tension through movement, not just while holding still. That makes them one of the most direct accessory drills for improving kipping mechanics, bar control, and overall midline integrity.
Muscles Worked
Equipment
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How to Do the Hollow Rock
Set up in a strong hollow hold with lower back pressed to the floor.
Use a small shift of body weight to rock toward the shoulders.
Rock back toward the hips while keeping the shape unchanged.
Keep the movement smooth and controlled — no flailing.
Common Mistakes
Arching the lower back during the rock.
Using momentum from the arms or legs instead of trunk tension.
Making the rocks too large and losing the position.
Coaching Tips
If you lose the hollow, regress to a static hold immediately.
Small rocks with perfect shape are far better than large sloppy rocks.
Scaling Options
Easier / Beginner
Bent-knee hollow hold, static hollow hold, or tucked hollow rocks.
Harder / Advanced
Longer rock sets, arms fully overhead, or weighted hollow rocks.
Frequently Asked Questions
What is the difference between a hollow hold and a hollow rock?
A hollow hold is static, while a hollow rock adds movement without changing the body shape. That added movement makes it more specific to CrossFit gymnastics and kipping drills.
Related Exercises
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