n this episode, we explore the tools and principles essential for understanding environmental physiology. Starting with how latitude impacts barometric pressure, we discuss key measurement tools like WBGT, barometers, pulse oximeters, and metabolic carts. We explain the relevance of gas laws—Boyle’s, Dalton’s, and Henry’s—to environmental challenges such as altitude and heat stress. Finally, we compare acclimatization and acclimation, outlining how these processes enable the body to adapt to extreme environments by coordinating cardiovascular, respiratory, and metabolic systems