Strengthen Your Knees - The PEP Regimen

Six exercises from the PEP regimen to strengthen your knees, and save yourself an injury.

O, The Oprah Magazine | April 14, 2009

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Vertical Jump

Improves lower-body strength and stability. Stand with hands at your sides. Slightly bend the knees and jump straight up. Land softly on the balls of your feet with a slight bend in your knees. Repeat 20 times.