About

More than a gym. Stronger starts here.

OG Boxing & Fitness is a coach-led training studio in Old Greenwich built around boxing-inspired fitness, strength, movement and athletic development. From high-energy group classes and personal training to youth programs, we help people of all levels get stronger, move better and feel their best.

Coach Greg kneeling with a group of members after class at OG Boxing & Fitness

Coach Greg Loomis

Coach Greg founded OG Boxing & Fitness to create a different kind of training experience — serious coaching in an environment where everyone feels welcome.

His approach combines boxing, strength, conditioning and athletic training to help clients improve fitness, build confidence and stay strong and active. From first-time beginners and everyday athletes to experienced boxers, every client gets hands-on coaching and training built around their goals.

Coach-Led, Always

Real coaching, personal attention and purposeful training in every class.

Train With Purpose

Boxing, strength, conditioning and athletic training designed to make you stronger, fitter and more capable.

Built For Every Level

From your first workout to years of training experience, we meet you where you are and challenge you to progress.

Members shadow boxing with light weights alongside a coach
Members working heavy bags in the OG Boxing & Fitness studio