World Gym maintains its 35-year legacy of body-sculpting know-how at its Jacksonville Beach Boulevard location, jump-starting workout routines with cardio equipment, free weights, and more than 50 weekly exercise classes, including yoga, spin, and Zumba, taught by certified trainers. After running, jumping, lifting, or stretching, exercisers can linger at the smoothie bar to slurp up chilled energy, before retiring to steam rooms that vaporize stress with misty heat. A colorful, carpeted childcare center entertains youngsters as parents submit backs to certified massage therapists who wrestle tension out of muscles.