TKO Fitness Durham, Durham

TKO Fitness' instructors get along swimmingly, even though they all love to fight. They boast a range of expertise garnered in careers as professional boxers while earning black belts in tae kwon do, or studying exercise science in college. They use their experience to conduct kickboxing classes, which utilize over 20 heavy bags; mixed-martial-arts classes, which are held in a cage-walled arena; and traditional boxing lessons, hosted in their floor-mounted, standard-sized boxing ring. In addition to their pugilistic fitness activities, they host a gym's worth of equipment for more standard workouts, including kettlebells and TRX suspension harnesses.