Sauna super charges detox via sweating. A short workout ahead of time ebsures maximum sweating without having to stay in sauna over 20 mins, which data shows as negative ROI.
Charcoal before sweating "catches" the internal dump of toxins. Wiping sweat through session "catches" the external dump of toxins.
Ice pack, sauna cap, and OJ minimize the stressful cost of a very high heat environment.