Crunch vs Hollow
Which one fits your Core workout plan?
Contents
Planfit users log Crunch more often — 29,245 sessions vs 426. Compare Core form, muscles worked, and when to use each.
Compare the benefits of Crunch and Hollow and pick the one that fits your Core workout.
Crunch vs Hollow: Which Do Planfit Users Choose?
Based on randomly selected data from 1 million completed workouts, Planfit users log Crunch more often — 29,245 sessions compared to 426 for Hollow.
What most people do isn't always what fits you. Crunch and Hollow differ in the muscles they work, the equipment they need, and how hard they are to learn — the comparison below covers each.
How Crunch and Hollow Differ
| What differs | Crunch | Hollow |
|---|---|---|
| Muscles worked | abs | abs and quads |
| Difficulty | 1 of 5 | 5 of 5 |
| Sessions logged by Planfit users | 29,245 sessions | 426 sessions |
How to Do Crunch
Crunch Muscles Worked: Core
Form
- 1. Please lift your upper body while keeping your back straight.
- 2. Slowly return to the starting position.
Coach's Tips
- 1. If you lift your upper body excessively, it can strain your lower back, so please lift your upper body without raising your back.
- 2. If your neck hurts, support your head with your hands and relax your neck while proceeding.
For a full Crunch guide with alternatives and benefits, see the Crunch exercise guide.
How to Do Hollow
Hollow Muscles Worked: Core
Form
- 1. Lift your upper body while keeping your feet off the ground.
- 2. Hold while engaging your core.
Coach's Tips
- In the holding position, only your hips should be touching the ground.
For a full Hollow guide with alternatives and benefits, see the Hollow exercise guide.
Frequently Asked Questions
Which is better for Core, Crunch or Hollow?
Planfit users log Crunch more often — 29,245 sessions against 426 for Hollow. Both train Core, so pick the one that matches the equipment you have and the muscles you want to load.
Do Crunch and Hollow work the same muscles?
Not quite. Crunch loads abs, and Hollow loads abs and quads.
What equipment do Crunch and Hollow need?
Crunch needs bodyweight only, and Hollow needs bodyweight only.
Which is easier to start with?
Crunch is the easier place to start. Move to Hollow once your form holds up.
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