Can I train for a race on a treadmill?

A friend of mine wants to run a half-marathon this spring. She's a mom to two young girls and works four days a week as a nurse practictioner, so she does most of her runs early in the morning, on a treadmill. She asked me recently, "Can I run a half-marathon if most of my training is on the treadmill?" Winter weather, limited daylight hours, and busy schedules put a lot runners in the same position. But it's definitely possible to train for a spring race doing mostly treadmill running.

FAQ: Can I train for a race on a treadmill?

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