Located in Wallingford, Connecticut, Underdog Fitness is co-owned by Kevin “Bubbles the Clowne” Gregory and Jess Gregory, with Kevin serving as Chief Fitness Officer and Jess as “Chaos Coordinator.” Kevin is a respected presence in the hybrid fitness community, with a deep focus on DEKA, HYROX, Obstacle Course Racing (OCR), and performance-based training. In tandem with the Underdog Training System Coaching Staff, Underdog Fitness delivers Premier Online 1:1 Personalized Performance Coaching.

Underdog Fitness was built around a simple belief: you don’t have to look like an athlete, feel like an athlete, or believe you belong in the fitness world to become one.

We work with everyone! Whether you're training for your first race, chasing a podium or World Championship title, getting back into fitness, or simply looking to become stronger and more confident, our goal is to meet you where you are and help you discover what you're capable of.