Navratilova retired from the game in 1994 and was inducted into International Tennis Hall of Fame in 2000, but returned to competitive tennis nearly a decade later.
In 2004, she became the oldest woman since 1922 to win a Singles Match at Wimbledon at the age of 47 and she also holds the record as the oldest person to win a Women's Singles Grand Slam at almost 50 years old.
Navratilova has always been committed to promoting exercise and a healthy lifestyle. In 2008, she shared recipes from her diet and fitness book "Shape Your Self" with "GMA" and says she became involved with the AARP to inspire the group's members to stay active and healthy.
"I do know that most people can do more than they do with their life," she told ABC News in 2004. "I wish they wouldn't use age as an excuse to not to something. That should not be a determining factor whether they are going to do something or not. So 30, 40 who cares? Just go out there and do it."
Navratilova will be hosting a live Web chat on Thursday, April 8, 2010 at 1 p.m. on the AARP Web site. CLICK HERE to learn more and register to participate.