Hollow Rock
Primary
Core
Secondary
Hip flexors
Equipment
Bodyweight
Difficulty
Intermediate
Type
Isometric
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Use for dynamic core training. The Hollow Rock — a isolation isometric hold — is one of the most effective ways to train your core, with secondary work on your Hip flexors.
Everything You Need to Know About the Hollow Rock
The Hollow Rock is a intermediate difficulty exercise that targets your Rectus abdominis and Transverse abdominis. It's a popular choice for building strength and muscle in these areas. When should you use it? Use for dynamic core training. This timing makes the most of your workout and helps you get better results. Who is this for? Intermediate to advanced for optimal results. Whether you're just starting out or working toward a specific goal, this exercise fits into your routine.
What muscles does the Hollow Rock work?
Primary
Secondary
Stabilizers
Step-by-step: Hollow Rock
- 1
Get into a hollow hold position.
- 2
Arms overhead, legs extended.
- 3
Lower back pressed to floor.
- 4
Rock forward and backward.
- 5
Maintain the hollow shape.
- 6
Keep core engaged throughout.
What are the best tips for the Hollow Rock?
Master hollow hold first.
Keep the banana shape.
Small, controlled rocks.
Don't lose core engagement.
Mistakes to watch for on the Hollow Rock
Breaking hollow position.
Isometric holds like the Hollow Rock build strength at specific joint angles. This mistake changes the angle and reduces how hard your Rectus abdominis has to work. Lock into position and hold it.
Rocking too aggressively.
Isometric holds like the Hollow Rock build strength at specific joint angles. This mistake changes the angle and reduces how hard your Rectus abdominis has to work. Lock into position and hold it.
Lower back arching for optimal results.
A compromised back position during the Hollow Rock puts your spine under unnecessary shear force. Brace your core and maintain a neutral spine throughout the movement.
Who should do the Hollow Rock?
Intermediate to advanced for optimal results.
How to Program the Hollow Rock
Lower reps with heavier weight builds raw strength. Your muscles and nervous system adapt to handle more load over time. This range is best for strength-focused goals.
This rep range keeps your muscles under tension long enough to trigger growth. Most people see the best muscle-building results in this zone. It balances strength and muscle size.
Higher reps with lighter weight builds muscular endurance and improves conditioning. This range is good for joint health and building work capacity.
General guideline: 3-4 sets of 20-30 seconds. Rest 45-60s.
What are good alternatives to the Hollow Rock?
Other Variations
- Hollow Rock to V-Up
- Weighted Hollow Rock
This Exercise Is in Your Plan
MySetPlan picks the right exercises for your goals — like the Hollow Rock — and builds them into a monthly program. Every set, every rep, planned out.
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Safety Notes
- Keep lower back pressed down.
- Don't rock too hard.