Los Angeles Lakers star James and World Cup skier Vonn just turned 40, and soccer's Ronaldo hits the Big-Four-Oh on Feb. 5.

Aging athletes such as LeBron James, Cristiano Ronaldo and Lindsey Vonn are similar to racing ... a Japan-born exercise physiologist at the University of Texas at Austin, told The Associated ...

Lindsey Vonn's comeback and her titanium knee Vonn ... "I don’t wake up and have to do kneecap (exercises) for 15 minutes and do a 30-minute warmup just to walk out the door.

When Lindsey Vonn announced her return to the U.S. Ski ... But Vonn said that after the surgery, she could do exercises and drills in the gym that she hadn’t been able to do in eight years.