How long should I hold it?

Work in sets of 20 to 40 seconds with the lower back flat, stopping the moment the position breaks. Several short quality holds beat one long set that collapses halfway through.

How do I make it easier?

Bend the knees, keep the arms by your sides, or hold the legs at a higher angle. Any of these shortens the lever and reduces the demand without changing the shape you are practicing.

How is this different from a plank?

Both are anti-extension holds, but the Plank is face down with the shoulders supporting body weight, while this version is face up with no load through the arms, so the abdominals get a more isolated stimulus.

Should my lower back touch the floor?

Yes. The lower back and hips are the only parts that should stay in contact with the ground, and keeping that contact is the standard for whether the hold is being performed correctly.

Can I do this every day?

Short daily holds are usually fine because there is no external load, though most people see enough progress from three to four sessions per week.

Hollow Hold

What Is the Hollow Hold?

Hollow Hold is an isolation exercise that primarily targets the core, with the rectus abdominis and obliques working isometrically while the hip flexors and quadriceps hold the legs in place. It is an intermediate-level movement performed lying on your back with the arms extended overhead and the straight legs lifted off the floor, so that only the lower back and hips remain in contact with the ground.

The position comes from gymnastics, where the hollow body is the default shape for swinging, handstands and rings work. Its training purpose is anti-extension strength: the abdominals resist the pull of the long arms and legs trying to arch the spine. That is a different quality from crunching, which trains the abdominals to shorten. Both matter, but the hollow position transfers more directly to positions where the trunk has to stay rigid while the limbs move.

Difficulty is controlled entirely by leverage. Tucking the knees and keeping the arms by the sides makes the hold accessible to almost anyone, while extending the legs and reaching the arms fully overhead, as shown, makes it demanding for well-trained lifters. Because the load is adjusted by limb position rather than by external weight, the exercise scales cleanly for a wide range of abilities without any equipment.

It benefits gymnasts and calisthenics athletes who need the shape as a prerequisite for skills, lifters who want trunk stiffness that carries over to squatting and pressing, and anyone training at home with no equipment. It is often programmed as a warm-up drill before overhead work or as timed sets alongside the Plank and the Side Plank.

The cue that matters most is pressing the lower back into the floor before lifting anything. If the lumbar spine arches away from the ground, the hold stops training the abdominals and starts loading the spinal extensors and hip flexors instead. Holding a shorter set in a genuinely flat-backed position is worth far more than a long set with a gap under the lower back.

Muscles Worked

MuscleActivation

Rectus Abdominis: Primary
External Oblique: High
Rectus Abdominis (Lower): High
Rectus Femoris: Medium
Tensor Fasciae Latae: Medium
Deltoid: Low
Serratus Anterior: Low
Vastus Medialis: Low
Adductor Longus: Minimal
Sternocleidomastoid: Minimal

Instructions

Lie on your back on a mat with the legs straight and the arms resting overhead.
Press the lower back firmly into the floor and exhale to draw the ribs down toward the pelvis.
Brace the abdominals and squeeze the glutes and thighs together with the toes pointed.
Lift the legs a few inches off the floor while keeping the knees locked.
Raise the head, shoulders and arms off the mat at the same time, reaching the hands past the ears.
Hold the shape with only the lower back and hips touching the ground, breathing shallowly through the nose.
Keep the lower back pinned throughout and lower the arms and legs together when the position starts to break down.
Rest fully before repeating the hold for the prescribed time.

Common Mistakes

Arching the lower back
Allowing a gap between the lumbar spine and the floor transfers the work to the spinal extensors and hip flexors.
Legs too low too soon
Holding the feet close to the ground before the position is strong enough is the usual cause of the back arching.
Flaring the ribs
Letting the ribcage lift toward the ceiling breaks the connection between the ribs and pelvis that the hold depends on.
Holding the breath
Bracing without breathing spikes internal pressure and shortens the hold well before the abdominals are genuinely fatigued.
Straining the neck
Pushing the chin forward instead of keeping the head in line with the arms causes cervical fatigue and soreness.
Chasing time over position
Extending the set after the shape has broken down trains a compensated position rather than the intended one.

Injuries

Hollow Hold is a low risk exercise when performed with proper technique. There is no external load, no impact and no joint range of motion under stress, so the main hazard is holding a poor position rather than the exercise itself.

The lower back is the structure most likely to be affected. As the abdominals fatigue, the pelvis tilts forward and the lumbar spine arches off the floor, which shifts the load onto the spinal extensors and can leave the lower back sore. The hip flexors also take on more of the work in that position, and a tight or overworked psoas can produce a pinching sensation at the front of the hip. The neck is a smaller concern, but holding the head up with the chin jammed forward for long sets often causes cervical fatigue.

Prevention is mostly about regression. If the lower back lifts, bend the knees, bring the arms alongside the hips, or raise the legs higher to shorten the lever until you can hold the flat-backed position for the full duration. Building up with the Dead Bug is a good route for anyone who cannot yet keep the ribs down. Once a 30 to 45 second hold is solid, progress to hollow rocks, the V-Up, or the L-Sit for a harder isometric.

End the hold as soon as the lower back leaves the floor, the legs start to drift upward on their own, or you feel pain in the spine or the front of the hip rather than fatigue in the abdominals.

Overview

Primary Focus: Core
Equipment: Body weight
Modality: Strength
Difficulty: Intermediate

Alternative Exercises

Other Names for the Hollow Hold

The Hollow Hold is also known as:

Hollow Body Hold

Frequently Asked Questions

Q: How long should I hold it?: Work in sets of 20 to 40 seconds with the lower back flat, stopping the moment the position breaks. Several short quality holds beat one long set that collapses halfway through.
Q: How do I make it easier?: Bend the knees, keep the arms by your sides, or hold the legs at a higher angle. Any of these shortens the lever and reduces the demand without changing the shape you are practicing.
Q: How is this different from a plank?: Both are anti-extension holds, but the Plank is face down with the shoulders supporting body weight, while this version is face up with no load through the arms, so the abdominals get a more isolated stimulus.
Q: Should my lower back touch the floor?: Yes. The lower back and hips are the only parts that should stay in contact with the ground, and keeping that contact is the standard for whether the hold is being performed correctly.
Q: Can I do this every day?: Short daily holds are usually fine because there is no external load, though most people see enough progress from three to four sessions per week.