Usa-Places.com has listed approx 14 gyms in Fairfax. Some of the Top rated gyms in Fairfax are- Planet Fitness, 24 Hour Fitness, Action Fitness Transformation Center, Recreation and Athletic Complex, CrossFit Mainstreet, Red Effect Infrared Fitness, Skyline Fitness Center, RAC field, F45 Training Fairfax Farms & George Mason Aquatic Center.