The tennis great says as an athlete she's always been mindful of diet and exercise. But when she was diagnosed with type 2 diabetes in 2007, she took it to a new level. The hardest change, she says, was cutting back on carbs and sugars. "That's not fun for a lot of people, but it sure is fun to feel good," she told Ladies' Home Journal. She tells people who are diagnosed: "Just know that you can live a normal, wonderful, terrific, active life."