H.E.A.T. 4 Athletes

Bass pulses synch up with heartbeats as up-tempo music reverberates off the sunset-orange walls of the studio at H.E.A.T. 4 Athletes. The sound rattles free weights, massive car tires, and advanced RealRyder exercise bikes, which add side-to-side motion to stationary-bike workouts. The gym, whose name is an acronym for "highly effective athletic training," hosts high-intensity boot-camp classes, cycling courses, and personal-training sessions throughout the week. A staff of certified instructors captain each session, guiding students through effective movements and exercises beneath television screens displaying energizing videos rather than popular morality plays about tortoises.