Quote:
Originally posted by Jimbob666
How do caffeine or alcohol screw it up? It's a rare moment indeed when I don't have one or the other, or most likely both, in my system. I'm a big fan of the irish coffee.
|
It puts a slight electrical current through your body. Fat and muscle have different resistances to electricity, so it can measure that resistance to determine how much fat vs muscle you have.
More or less water in your body will also alter your electrical resistance, which would throw off the scale. Caffeine/alcohol remove water from your body, so that's why they cause problems with readings.