If checking your heart rate is something you only have done at an annual check-up, maybe it's time to look into the "theory" behind one of the nation's hottest fitness brands -- Orangetheory.

Today's episode features Katy Widrick -- group fitness instructor, multi-media producer, blogging genius and personal friend of the show. Katy has made Orangetheory a dedicated part of her fitness journey and is sharing with listeners why.