LeBron James of the Miami Heat drives to the basket against J. J. Hickson of the Cleveland Cavaliers on Tuesday night, where Cleveland avenged an old injury. Jared Wickerham/Getty Images hide caption

toggle caption Jared Wickerham/Getty Images

L.A. Matadors head coach Manny Robles works with a team member during training session at The Rock boxing gym in Carson, Calif. Tom Goldman/NPR hide caption

toggle caption Tom Goldman/NPR

Paramedics and track staff add padding to the poles that slider Nodar Kumaritashvili crashed into ahead of the 2010 Winter Games. Elise Amendola/AP hide caption

toggle caption Elise Amendola/AP

Chicago Bears quarterback Jay Cutler stands on the sideline in the third quarter after leaving the game with an injury against the Green Bay Packers on Sunday. His decision to sit out of the remainder of the game, which Chicago lost, made Cutler the target of critical Tweets from his peers in the National Football League. Jonathan Daniel/Getty Images hide caption

toggle caption Jonathan Daniel/Getty Images

Fitness pioneer Jack LaLanne, seen in this undated photo, was inspiring TV viewers nationwide to trim down and pump iron long before exercise became a national obsession. AP hide caption

toggle caption AP

NPR thanks our sponsors

Become an NPR sponsor