It's a very simple answer, how to get my abs so defined. I have a very healthy diet of a lot of laughter. If you laugh all the time, you're consistently flexing your abdominals all the time.

Crunches are much more effective than regular sit-ups because they specifically target your upper abdominal muscles rather than your hip muscles. If you're not used to them, they can cause soreness a day or two later, but it's a 'cool' soreness. A badge of honor.

Core strength and stability is very important to me. Tennis is all about rotation of the body and my ability to create power. I incorporate a lot of abdominal back and glute exercises into my gym sessions.