Muscles worked
Abs, hip flexors, shoulders, cardio.
Why mountain climbers works
Because your core has to keep bracing against the same anti-extension demand as a plank while your legs drive quickly underneath you, mountain climbers effectively layer a cardio workload on top of an isometric core hold — which is why they raise your heart rate faster than a static plank alone.
How to do mountain climbers
- Start in a high plank, hands under shoulders.
- Brace your core and keep your hips low.
- Drive one knee toward your chest.
- Quickly switch legs, like running in place.
- Keep a steady, controlled rhythm.
Form tips
- Keep your shoulders stacked over your hands.
- Do not let your hips bounce up.
- Control the pace — speed without form helps nothing.
Common mistakes
- Hips rising too high.
- Shifting weight back toward the feet.
- Bouncing rather than driving the knees.
Who should modify or avoid this
Anyone with wrist pain should try this on parallettes, dumbbells, or elevated on a bench to reduce wrist extension. If lower-back pain appears, it usually means the hips have crept up — slow the pace and reset the plank position.
Sets and reps
3 sets of 30–40 seconds, or 20 reps per leg.
Variations & progressions
- Easier: slower pace or hands elevated.
- Harder: faster pace or cross-body knees.
- Add to a circuit for conditioning.
Looking for a full routine? Try our beginner bodyweight workout.