Plank Core Control
plank core workout
3 rounds for quality
20-30 sec Plank
8 controlled Push Up reps
Rest 45 sec without losing position
Bodyweight
Plank — CrossFit Core Technique Guide
BB
By Borja Bes — CrossFit Athlete & Hyrox Finisher
The plank is the most universal anti-extension core exercise in training, and it matters in CrossFit because almost every movement gets better when the athlete can resist lumbar extension under fatigue. Push-ups, wall walks, handstand push-ups, carries, and heavy barbell lifts all depend on the same braced trunk position. The plank may look basic, but in a functional fitness glossary it deserves a dedicated page because it is a foundational skill, not filler.
Quick answer
The plank is the most universal anti-extension core exercise in training, and it matters in CrossFit because almost every movement gets better when the athlete can resist lumbar extension under fatigue. Use Plank for controlled trunk work and end the set before the lower back or pelvis loses its intended position.
Curated demonstration
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How To Plank (Proper Form | Cues | Progressions)
E3 Rehab · reviewed 2026-08-06
Muscles Worked
Transverse abdominisRectus abdominisShouldersGlutes
Equipment
None
Best For, Avoid If, and Scaling
| Best for | Plank trunk-control work for transverse abdominis and rectus abdominis that supports lifting, gymnastics and posture without relying on fast, loose repetitions. |
|---|---|
| Avoid if | Avoid or scale Plank if pain changes the movement or the intended position cannot be controlled. Correct this common fault before adding volume: letting the lower back drop into extension. |
| Scaling | Knee plank, elevated plank, or shorter intervals. |
How to Do the Plank
1
Set up on forearms or hands with elbows under shoulders.
2
Extend the legs and squeeze glutes and quads.
3
Keep ribs down and pelvis neutral — no sagging lower back.
4
Hold a straight line from head to heels while breathing normally.
Common Mistakes
✕
Letting the lower back drop into extension.
✕
Piking the hips too high and removing trunk demand.
✕
Holding the breath instead of bracing and breathing together.
Coaching Tips
✓
Think of pulling the elbows toward the toes to light up the trunk.
✓
Shorter high-tension planks usually transfer better than long lazy holds.
Scaling Options
Easier / Beginner
Knee plank, elevated plank, or shorter intervals.
Harder / Advanced
Long-lever plank, shoulder taps, weighted plank, or plank drag variations.
Training Examples
Train Plank with a Clear Purpose
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Plank Trunk Finisher
plank finisher
Every 90 sec x 5 rounds
20-30 sec Plank
20 sec easy breathing reset
Stop before the lower back compensates
Frequently Asked Questions
Why does the plank matter for CrossFit if it is not a common competition movement?
Because it teaches the anti-extension trunk stiffness that protects the spine and improves force transfer in pressing, gymnastics, carries, and barbell lifts.
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