Since 1998, Ultimate Fitness has provided the amenities of a large health club chain, with the service and personality of a hometown gym. Please browse our site to find out about our top-rated facility. Ultimate Fitness is a proud member of The International Health, Racquet & Sports Club Association (IHRSA). IHRSA is a non-profit trade association representing health & fitnessfacilities, gyms, spas, sports clubs, and suppliers world wide. The Mission of IHRSA is to grow, protect, and promote the industry, and to provide its members with benefits that will help them be more successful.