Mountain climber
In a high plank, drive your knees towards your chest one at a time.

How to do it
- Start in a high plank: hands under your shoulders, body straight.
- Bring your right knee towards your chest.
- Step it back and bring your left knee in.
- Keep switching at a steady pace. Each knee is one rep.
Common mistakes
- Hips bouncing up high. Keep them level with your shoulders.
- Hands drifting forward. Keep them under your shoulders.
- Going too fast to stay in control. Steady beats fast.
Easier or harder
In the plan
- Beginner
- Not used
- Intermediate