General Discussion

AI -“Yes, people do sometimes use a parked car as an impromptu sauna by leaving it in direct sunlight with the windows rolled up (or mostly closed) on a hot day. This is a real thing discussed online—Reddit threads, TikTok videos, YouTube hacks, and articles describe it as a "free" or "DIY" sauna alternative, especially in summer when exterior temperatures hit 80–100°F+ (27–38°C+). The greenhouse effect inside a closed car can rapidly push interior temps to 120–140°F (49–60°C) or higher within minutes to an hour, causing heavy sweating similar to a traditional sauna session.

Some folks report doing short sessions (e.g., 10–20 minutes) after workouts for recovery, claiming it helps with relaxation, detoxification through sweat, or heat acclimation (like racecar drivers training for hot cockpits). There are even extreme examples, like Estonians converting old cars into actual wood-fired saunas with chimneys and sound systems.”