Hydration: Why are Hydration Levels Important?

The Tanita Body Fat Monitor relies on the body's electrical conductivity, which in turn relies on the body's fluid levels. Fat tissue is anhydrous and resists an electrical signal, while muscle tissue is relatively hydrated and conducts an electrical signal. However, factors such as temperature, how much exercise you have done, when you last had a drink, medical conditions (including menstruation), medications, alcohol, caffeine etc., can also affect the hydration level of a person's muscle tissue, which can then affect the body fat reading. The time of day can also affect hydration levels, as well as fluid distribution in the body. It is for this reason that Tanita recommends that readings are most consistent when taken between 5 and 6pm before the evening meal.