If You Tear a Knee Ligament, Arthritis Is Likely to Follow in 10 Years

We Are Nowhere Close to the Limits of Athletic Performance

Is This New Swim Stroke the Fastest Yet?

N.F.L.’s Flawed Concussion Research and Ties to Tobacco Industry

The Sports Bubble Is About to Pop

Can a Better Football Helmet Save Your Kid’s Brain?

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The Cost of an ACL Injury

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