What is sweat loss?During exercise, water and electrolytes are lost as a consequence of thermoregulatory sweating. In some situations, especially when exercise is prolonged, high-intensity, and/or in a hot environment, sweat losses can be sufficient to cause excessive water/electrolyte imbalances and impair performance. What is the importance of sodium in sweat loss?Sodium is an essential component of most athletes' diets because sodium ingestion helps restore total body water and fluid-electrolyte balance by replacing sweat sodium losses. What is the healthy sweat loss?An average person sweats between 0.8 to 1.4 liters – that's roughly 27.4 to 47.3 oz. – per hour during exercise. What happens if you don't replace the sodium lost in sweat?You need to replace sodium too in order to avoid your blood becoming diluted. This is a potentially disastrous condition called hyponatremia, which can certainly ruin your race and, tragically, has even been fatal on occasion. How is sweat loss measured?Check/measure the amount of fluid consumed during training. Add the amount of fluid lost to the amount of fluid consumed to get total fluid losses. Divide the total amount of fluid lost by the number of hours of training to get fluid losses per hour.
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