Mind Pump hosts cite sauna study claiming 32% endurance gain in three weeks

What was said

"Here's what they found. This is over 3 weeks, 12 to 13 sessions. Runtime to exhaustion at a 5k pace where I was 32%. So 32% uh in improvement to exhaustion. That's a 1.9% better endurance time trial performance, which is huge. Plasma volume went up 7%, red cell volume up 3.5%."

The hosts discuss research on post-training sauna use and cite a crossover study in competitive male runners involving 30 minutes at 90°C (194°F) after running, 12–13 sessions over three weeks. They claim the study reported a 32% improvement in run time to exhaustion at 5k pace, alongside increases in plasma and red cell volume.