Knees to Elbow vs Hollow
Maximizing Your Core Workout Plan
Contents
Knees to Elbow is the easier place to start — difficulty 2 of 5 vs 5. Compare Core form cues and when to progress.
Customize Your Core Workout: Explore the Benefits of Knees to Elbow and Hollow for Better Comparison.
Planfit Users' Choice about Knees to Elbow vs Hollow : Which is Better?
Based on randomly selected data from 1 million completed workouts, Planfit users log Hollow more often — 426 sessions compared to 347 for Knees to Elbow.
Popularity is not the whole answer. Knees to Elbow and Hollow differ in the muscles they load, the equipment they need, and how hard they are to learn — the comparison below covers each.
How Knees to Elbow and Hollow Differ
| What differs | Knees to Elbow | Hollow |
|---|---|---|
| Muscles worked | abs | abs and quads |
| Difficulty | 2 of 5 | 5 of 5 |
| Sessions logged by Planfit users | 347 sessions | 426 sessions |
How to Knees to Elbow
Knees to Elbow muscles worked: Core
Form
- 1. Place both hands behind your head and engage your core.
- 2. As you lift your upper body, touch one elbow to the opposite knee.
- 3. Slowly return to the starting position and repeat the same on the other side.
Coach's Comment
- When raising your knees, engage your core and be careful not to twist your body excessively.
If you want to know a detailed guide to Knees to Elbow, alternative exercises, and its benefits, check it out here. Check out the Knees to Elbow Guide page of our blog!
How to 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 Comment
- In the holding position, only your hips should be touching the ground.
If you want to know a detailed guide to Hollow, alternative exercises, and its benefits, check it out here. Check out the Hollow Guide page of our blog!
Frequently Asked Questions
Which is better for Core, Knees to Elbow or Hollow?
Neither is clearly ahead — Planfit users log both at a similar rate. They both train Core, so the choice comes down to the equipment you have and the muscles you want to load.
Do Knees to Elbow and Hollow work the same muscles?
Not quite. Knees to Elbow loads abs, and Hollow loads abs and quads.
What equipment do Knees to Elbow and Hollow need?
Knees to Elbow needs bodyweight only, and Hollow needs bodyweight only.
Which is easier to start with?
Knees to Elbow is the easier place to start. Move to Hollow once your form holds up.
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