HOTWORX - Goodlettsville, TN

Workouts revolve around what the studio terms 3D Training, blending heat, infrared, and movement inside each sauna. Members have unlimited 24/7 access to virtual sessions, ranging from high-intensity 15-minute routines like Hot Cycle and Hot Thunder to half-hour isometric work including Hot Barre None. The Goodlettsville studio is owned and run by a retired Air Force Master Sergeant and Gulf War veteran.