The Beurer diagnostic scale BG13 not only measures the weight and bone mass with an accuracy of 100 grams, it also indicates the proportion of body fat, body water, muscle percentage, bone mass, calorie requirement and ideal weight as a percentage of the total mass of. So it can be determined whether the amount of exempt kilos come back from jogging (muscle mass) or the Feast (body fat). The BG13 has a weighing range up to 150 kg and stores the data for up to ten people.