Red Effect Infrared Fitness in downtown San Diego's East Village runs every class inside full-spectrum infrared sauna chambers at 1490 J Street, using the RE24 franchise's format of pairing HIIT circuits with therapeutic radiant-heat exposure. Classes rotate through infrared-enhanced cycling, rowing, yoga, and strength-training concepts inside sauna pods ranging from solo 6-by-6 enclosures to 12-by-12 group chambers, layering radiant heat into modalities that share the heated-exercise approach of SaltVault Hot Pilates. Heart-rate monitoring displays real-time zone data on in-sauna screens, and virtual instructors coach each session from a smart TV, keeping form cues and pacing targets consistent across the fully automated facility model. A separate functional training room houses treadmills, stairmasters, free weights, Smith machines, squat racks, and synergy cable stations for members who want conventional resistance training between infrared sessions. The infrared spectrum promotes vasodilation and accelerated muscle recovery during the workout itself, reducing delayed-onset soreness in a way that layers with the post-training soft-tissue work at Thai Diego Massage & Medspa. The most intensive protocol stacks a 45-minute infrared cycling or rowing class with immediate transition into a strength circuit in the functional room, combining heat-adapted cardio with conventional resistance loading in a single session designed for advanced metabolic conditioning.