Mountain climbers are a great way to work on your upper body and core strength while adding cardio through the lower body. Start by stepping one knee in toward your chest at a time, then as you build up strength, you can run them in at a greater pace.
- Start in plank position, shoulders directly over your hands and propped up on your toes.
- With your core engaged, bring your right knee forward under your chest, lifting your foot off the ground.
- Return your foot to the starting position and switch legs, bringing the left knee forward.
- Keep switching legs and begin to pick up the pace until it feels a little like running in place in a plank position.
- Continue running in your plank for 25-50 reps.
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