Sweat glands are most numerous on the soles of the ft. 1. A coil generates an extremely-filtrated fluid. This fluid has the same sodium concentration (isotonic) as the Healthy Flow Blood. 2. The fluid travels from the coil up the sweat duct which reabsorbs sodium and chloride (but not potassium). This reabsorption is through lively transportation (i.e. it requires power from ATP). The Glycogen saved in the sweat glands will only assist the reabsorption for less than 10 min., so the energy is predominantly supplied by the blood. Glucose is the preferred power supply, although Lactate and pyruvate can also be used. Fatty acids, ketones, and amino acids are very poorly used. The reabsorption course of also acidifies the final sweat. The speed of sweat production depends upon the local skin temperature and core physique temperature. The desk below is based on the analysis showing that sweat sodium focus will increase with sweat rate. The desk under is for a runner who's 174cm/70inches excessive and weighs 60Kg/132lbs, but you possibly can create a personalized chart at Sodium Loss.