Box 'N Burn | 267 followers on LinkedIn. Get Box N Burn Classes in your gym with BoxingFitness.com | Box 'N Burn, California's #1 Gym is joint owned by Olympic Medallist & Undefeated Professional Fighter Tony Jeffries; and Professional Fitness Expert & Boxing Trainer Kevan Watson and is growing everyday. Box 'N Burn in partnership with Everlast has also created Box 'N Burn Academy, a top level professional Certification course available to the public. About Regardless of age, fitness level or experience Box 'N Burn is THE premiere boxing & fitness facility in Los Angeles!