Mountain Climber
A fast-paced knee drive from a plank position that trains the core and spikes the heart rate — the go-to HIIT finisher.
How to do it
- Get into a high plank with your hands directly under your shoulders and your arms straight.
- Brace your core hard and squeeze your glutes to keep your hips level with your shoulders.
- Drive your right knee toward your chest, keeping your foot off the floor at the front of the movement.
- Snap your right leg back while driving your left knee forward in a smooth, alternating rhythm.
- Keep your hips low and your shoulders over your wrists for the whole set.
- Continue for 20–40 seconds at a controlled pace, prioritizing technique over raw speed.
Key technique cue
Hands under shoulders, hips level with them — drive knees to the chest.
Common mistakes
- ✕ Bouncing the hips up and down, which takes the load off the core and breaks the plank position.
- ✕ Arching the lower back as the legs move, which loads the spine instead of the core.
- ✕ Placing the hands too far forward of the shoulders, which collapses the plank and stresses the wrists.
- ✕ Going so fast that the range disappears and the knees barely move instead of driving toward the chest.
Benefits
- ✓ Trains the core under load while spiking the heart rate.
- ✓ Builds general fitness with no equipment or space needed.
- ✓ Reinforces a strong plank position under fatigue and movement.
About the exercise
The Mountain Climber is one of the most widely used conditioning exercises in modern training. Holding a high plank, the lifter alternates driving the knees toward the chest as fast as technique allows. The combination of plank-level core loading and fast-paced leg movement makes it a powerful core-and-cardio hybrid that needs no equipment at all. It is a staple for HIIT circuits, bodyweight finishers, warm-ups and home and travel workouts where space and equipment are limited. It pairs naturally with burpees and jumping jacks.
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