Crunches vs Plank: Which Is Better?
Quick answer: Calorie burn is nearly identical (5 vs 4 cal/min). Both train rectus abdominis, but crunches also hits the same muscles while plank adds transverse abdominis.
Side-by-Side Comparison
| Attribute | Crunches | Plank |
|---|---|---|
| Primary Muscles | Rectus Abdominis | Rectus Abdominis, Transverse Abdominis |
| Secondary Muscles | Obliques | Obliques, Shoulders, Glutes |
| Difficulty | Beginner | Beginner |
| Equipment | None (bodyweight) | None (bodyweight) |
| Calories/Min | ~5 cal | ~4 cal |
| Category | Core | Core |
| Fitnit AI Tracked | Yes | No |
When to Choose Crunches
Crunches are a classic abdominal exercise that isolates the rectus abdominis. When performed correctly, they're an effective way to build core strength and muscular endurance.
Choose crunches when you want to target your rectus abdominis without any equipment. Rated beginner difficulty, burning ~5 cal/min.
Key Benefits
- Targets the rectus abdominis specifically
- Low impact and beginner-friendly
- No equipment required
- Can be performed anywhere
When to Choose Plank
The plank is a foundational isometric core exercise that builds stability and endurance. By maintaining a rigid body position, you train the deep core muscles that protect your spine.
Choose plank when you want to target your rectus abdominis and transverse abdominis without any equipment. Rated beginner difficulty, burning ~4 cal/min.
Key Benefits
- Builds isometric core strength
- Improves posture and spinal stability
- No equipment or movement required
- Engages multiple muscle groups simultaneously
Can You Combine Them?
Since both heavily target rectus abdominis, consider alternating them across different days.
Frequently Asked Questions
Are crunches or plank better for beginners?
Both are beginner-level. Either works equipment-free.
Which burns more calories?
They're close: 5 vs 4 cal/min. The choice should come down to which muscles you want to train.
Can I do both in the same workout?
Both heavily target rectus abdominis, so doing them on consecutive days risks under-recovering. Better to alternate (one on Mon, the other on Thu) or use one as the warm-up to the other.
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