Burlington NC's Health and Fitness Gym Since the early 2000s, Superfitness has been offering Burlington residents an elite fitness club experience that has become a local household name and staple to the area. We are one of the longest-running, independently owned GYMS in the Triad of NC and pride ourselves on our national brand Superfitness New & Used Gym Equipment, which specializes in Commercial GYM Equipment New & Pre Owned name brand commercial fitness equipment.