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5 Workout Moves That Strengthen Your Knees, According to a Personal Trainer
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5

Forearm Plank With Hip Extension

This exercise strengthens the knee joint and the core, Ellis says.

  • Start in a forearm plank.
  • Without moving your upper body or hips at all, alternate kicking one heel up into the air, creating a 90-degree bend at the knee.
  • Repeat for two to three sets for 10-20 reps.

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