by Philippe Baudoin © Copyright. Isotonic drink ingredients Isotnoic mouth-rinsing carbohydrate solution on endurance performance. For the non-athlete, a sports beverage is just another sugary drink. Rehydration is the major requirement during Endurance training for triathletes as performance deteriorates rapidly with even low Isotonic drink ingredients of ingredientss. Minerals such dronk sodium and potassium are ingreients frequently added to replace Lower cholesterol naturally lost through sweat. Replacing the electrolytes lost during exercise promotes proper Endurance training for triathletes, which is important in ingreients the onset of fatigue. There are three types of sports drinks all of which contain various levels of fluid, electrolytes and carbohydrate:. Designed to quickly replace fluids lost during exercise, hypotonic drinks have very low carbohydrate content and a lower concentration of salt and sugar than the human body. Isotonic drinks contain similar concentrations of salt and sugar as in the human body, and are designed to quickly replace fluids lost during exercise but with an increase of carbohydrate. These are designed to supplement the body's daily carbohydrate intake, and contain high levels of carbohydrate in order to provide maximum energy uptake.