Abstract: Beverage product, especially adapted for rapid administration of water and carbohydrates to the human body during periods of heavy muscle work, which consists of a preferably monosaccharide-free solution containing 3-25% by weight of a mixture of soluble oligosaccharides with DP values between 2 and 10 inclusive, the average DP value of the oligosaccharide mixture preferably being in the range 3-5; at least one physiologically acceptable alkalizing compound or compound combination; and optionally salts occuring in body liquids and suitably aroma and taste-improving substances, all of them in minor amounts; the solution's content of the physiologically acceptable alkalizing compound or compound combination being such that when the beverage is consumed during heavy muscle work (e.g. at 60% of the maximal aerobic capacity) in an amount of 250 mls each fifteenth minute during one hour gives an increase of the pH value in the vertricle contents to above 3.5, preferably above 4.5, especially above 7.0.