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Richard Welling - Prosthetic Knee Movement

Richard Welling - Prosthetic Knee Movement (0:47)

Jaxon's prosthetic leg works similarly to a real leg, says prosthetist Richard Welling. The knee is locked and stable when Jaxon's weight is in his heel, and it unlocks when he puts weight on the toe.

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All parents worry about their kids' health. Sharecare children's health experts offer tips on everything from vaccines to childhood nutrition, fitness, sleep and emotional well-being to help your kid thrive at home and in school.

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