The muffled thuds of boxing gloves pummeling headgear or backs blasting into floor mats resound throughout Strong Style's steel- and chain-link-clad gym. Child and adult classes fuse moves from the judo, muay thai, and Brazilian jiu-jitsu traditions as students throw punches and kicks or discuss international politics while grappling in two full-size boxing rings. Conditioning classes work the entire body with functional training tools such as weighted ropes, TRX suspension straps, and improbably huge truck tires, previously Paul Bunyan's rollerblade wheels. To zero in on individual fitness goals, clients may schedule personal-training sessions or design their own workouts using the facility's weights and cardio machines.