Hollow Rock
- Músculo objetivo
- —
- Equipamiento
- Body weight
- Parte del cuerpo
- Waist
- Tipo
- Strength
The hollow rock is a bodyweight core exercise that builds anterior trunk strength and control by rocking in a tight hollow-body position. It primarily targets the rectus abdominis, with the hip flexors assisting to hold the legs and arms extended. Common in gymnastics and calisthenics, it trains the rigid, braced midsection that carries over to leg raises, levers, and overhead work.
Cómo hacer el Hollow Rock
- 1Lie on your back with your arms extended overhead and your legs straight.
- 2Press your lower back firmly into the floor and tilt your pelvis to flatten the gap between your spine and the ground.
- 3Lift your shoulders, arms, and legs a few inches off the floor so only your lower back and hips remain in contact, forming a shallow banana or hollow shape.
- 4Brace your abs and keep your ribs pulled down, holding the arms and legs straight throughout.
- 5Rock smoothly toward your head, then toward your feet, using a small momentum from the shoulders and hips while keeping the hollow position rigid.
- 6Keep the rocking shallow and controlled so your lower back never arches off the floor at the ends of the motion.
- 7Continue rocking for the prescribed time or reps, then lower your shoulders and legs back to the floor under control.
Consejos de técnica
- Think of the body as one rigid plank from fingertips to toes — the rock comes from the whole shape moving, not from bending at the hips.
- Keep your lower back glued to the floor; if it lifts, raise your arms or legs higher to shorten the levers until you can hold position.
- Exhale and pull your ribs down to keep the front of the trunk fully engaged.
- Start with bent knees or hands by your sides, then progress to the full extended position as your control improves.
- Move slowly at first — control the rock before adding speed or range.
Errores comunes
- Letting the lower back arch off the floor, which breaks the hollow position and shifts strain to the spine instead of the abs.
- Bending and straightening at the hips to create the rock, which turns it into a flailing motion and removes tension from the core.
- Using big, jerky momentum from the arms, which sacrifices control and lets the trunk lose its braced shape.
- Flaring the ribs and letting the chest pop up, which disengages the abs and reduces the trunk tension the drill is meant to train.
- Holding the breath the whole set, which makes it harder to keep the abs braced and ribs pulled down.
Preguntas frecuentes
What muscles does the hollow rock work?
It mainly works the core, especially the rectus abdominis (the front abdominal wall), with the hip flexors assisting to hold the straight legs and arms off the floor. It is an anterior-core exercise for the waist.
Is the hollow rock good for beginners?
Yes, if you scale it. Beginners should start with bent knees and arms by the sides, or simply hold a static hollow position before adding the rock, then extend the limbs as core control improves.
Why does my lower back hurt during hollow rocks?
Usually the lower back is arching off the floor because the abs can't yet hold the position. Shorten the levers by raising your arms or bending your knees, and keep the lower back pressed down throughout.
How many reps of hollow rocks should I do?
A common starting point is 3 sets of 10–20 controlled rocks, or timed sets of 20–40 seconds. Stop the set as soon as your lower back lifts off the floor, since quality of position matters more than the count.
What's the difference between a hollow rock and a hollow hold?
The hollow hold is a static isometric hold of the hollow-body shape, while the hollow rock adds a controlled rocking motion in that same position. The rock builds on the hold once you can keep the position rigid.
