Muscle Cramps & Headaches - Sweat takes with it water and crucial salts (electrolytes), causing dehydration., Weakness & Fatigue - Intense physical activities that elicit maximal oxygen uptake eventually reduce oxygen delivery to the exercising muscles so aerobic metabolism decreases and anaerobic metabolism increases., Dizziness & Fainting - Vasodilation leads to reduced blood flow to the brain which can lead to sudden drops in blood pressure., Nausea & Vomiting - Digestive processes result in additional metabolic heat and stress so the body purges the stomach to mitigate this., Confusion - Heat increases some brain connections while reducing others which adversely affects attention, memory and processing of information., Seizures & Brain Damage - Some cells experience endoplasmic reticular stress due to denaturing of nascent polypeptide chains, as well as nuclear and cytoskeletal damage., Coma & Death - Damage to multiple organs leads to multi-organ failure.,

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