NUTR3000 Study Guide - Quiz Guide: Exercise Intensity, Sports Drink, Hemorheology
Document Summary
Sweat is the only way to lose heat when the ambient temperature is greater than the skin temperature. 1 litre of sweat, when evaporated, helps the body lose 580kcal of energy. A marathon runner can lose 21-33 ml of sweat per minute while the maximal rate of gastric emptying is. Gastric emptying rate is the time is takes a meal to move through a person"s stomach. Drinking when you"re thirsty normally replaces 1 2 of uid losses and will generally prevent body mass falling to more than 2%. So there"ll always be a net loss of water from the body. Performance and health problems occur when body mass falls by more than 2% during exercise. Exercise at a higher intensity > greater heat production in the body > you sweat more. Hypohydration results in a decrease in blood volume. Exercise > water gets lost from the body, blood becomes thicker.
