How to do mountain climber hiiit ab exercise

Mountain Climber

Start in standing plank position with wrists in line with elbows and a neutral back. Alternate bringing your knees into your chest in a running motion. Focus on keeping your hips parallel to the mat, making sure not to rock side-to-side as you pedal your legs back and forth. To decrease intensity, slow the movement down by stepping forward with each foot.

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