Circuit Two: Twisted Mountain Climber

Mountain climbers are such an effective exercise, and adding a twist really works the abs from all angles.

  • Start in a traditional plank — shoulders over hands and weight on your toes.
  • With your core engaged, twist to bring your right knee forward under to your left elbow. Return to your basic plank to complete a rep. Switch legs, bringing the left knee forward to the right knee for your second rep.
  • Do 20 reps, alternating sides.

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