Regular sauna use has been shown to improve cardiovascular function and exercise performance by enhancing VO₂ max (maximal oxygen uptake). Heat exposure induces plasma volume expansion, which increases stroke volume and cardiac output, thereby improving oxygen delivery to working muscles. Repeated sauna sessions also upregulate heat shock proteins and mitochondrial biogenesis, supporting greater cellular efficiency and endurance capacity. Additionally, heat acclimation reduces cardiovascular strain during exercise by lowering heart rate at a given workload and improving thermoregulatory control. Together, these adaptations contribute to higher VO₂ max values, delayed onset of fatigue, and improved overall athletic performance, making sauna use an effective adjunct to traditional endurance training. @mindpumpmedia