Abstract des Autors

Dehydration resulting from sweat loss is a major factor contributing to fatigue during prolonged exercise. The extent of sweat loss during exercise is determined primarily by the exercise intensity and the ambient temperature, but there is also a wide variation between individuals exercising under the same conditions. Electrolytes, principally sodium and chloride, are lost in sweat. Exercise capacity is reduced even by small losses. Fluid intake during exercise is aimed primarily at replacing water losses to maintain the circulating blood volume, and at supplying carbohydrate to supplement the body energy stores. Dilute carbohydrate-electrolyte solutions offer the most effective water replacement: concentrated carbohydrate solutions can supply more energy, but are less effective in replacing water losses. Replacement of electrolyte losses, other than possibly sodium, is not normally necessary during exercise and can be achieved by the normal dietary intake exercise. Verf.-Referat