HER STORYTM: Shannon Castle, triathlete and aspiring surgeon

Because nothing motivates us to stay healthy and active more than hearing stories of other athletic women, Her Sports brings you Her Story, monthly profiles of women like you.

Shannon Castle - Poway, Calif.

Age: 26

Sports: Triathlon, running

Profession: Medical student, University of California San Diego

How I got started in sports: I had been running for several years. When I got an overuse injury, I started swimming to keep in shape. My friend convinced me to buy a bike and do all three sports. My first race was the Carlsbad Triathlon in 2004, and I've been addicted since.

Favorite spot to be active: For running, Torrey Pines State Reserve in San Diego. For biking, the coast; the ocean is a great backdrop for any ride.

Life/sport philosophy: Triathlon won't taker over my life; it just helps me balance everything.

Athletic highlights: I ran my first marathon in January, the Carlsbad Marathon.

Athletic goals: Do a half Ironman and run the Boston Marathon.

Favorite fuel: I can't get enough oatmeal. It's great fuel for a morning workout, but I've eaten it for dinner, too.

When I'm not running, biking or swimming, I'm: Usually in the hospital working on my M.D. or spending time with my 8-year-old daughter, Regan. We like to hang out at the beach, explore museums and bike around the lake.

Other interesting facts: I'm a single mother trying to model a healthy, balanced lifestyle for my daughter. Professionally, I want to become a surgeon.

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