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Edition #21 · Tuesday, May 12, 2026 · 1195 positive stories
Science & Breakthroughs

The three muscle groups behind knee stability, and how to train them

Optimist Daily Tue, 12 Ma
The three muscle groups behind knee stability, and how to train them

BY THE OPTIMIST DAILY EDITORIAL TEAM Running, climbing stairs, squatting to pick something up from the floor: every one of these movements passes through the knees. It is easy to take that for granted until they start to complain. “Everybody could probably benefit from some sort of strengthening to improve stability of the knee,” says Carrie Whitelam, a physical therapist at Hospital for Special Surgery in New York City. Knee stability, as Whitelam defines it, is “the ability to maintain alignme

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About Science & Breakthroughs coverage

The science section covers breakthroughs in medicine, physics, biology, and technology. We surface discoveries that expand what humanity can do, from new treatments reaching clinical trials to engineering feats that seemed impossible a decade ago. Every link goes to the original publisher so you can read the full study or press release yourself.

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