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How to Do Clamshell — Form, Muscles & Tips

Learn how to do the Clamshell: step-by-step form, muscles worked, body only setup, and common mistakes. Free workout tracker included.

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How to perform this exercise

  1. Lie on your side with hips and knees bent at roughly 45 degrees, feet together.
  2. Keep your feet stacked and your hips stacked on top of each other.
  3. Rotate your top knee upward as high as possible without rotating your pelvis.
  4. Hold briefly at the top, squeezing the glute.
  5. Lower the knee back to the starting position.
  6. Repeat for the desired number of repetitions then switch sides.