Hot answers tagged weightlifting
2
Ok, the last line of your post now makes it clear. The type of measurement that they are doing is called bioelectric impedance analysis (BIA). These have an error rate of anywhere from plus or minus 5% on up depending on the quality of the unit being used.
BIA can also run high or low depending on factors such as skin sweat, level of hydration, timing of ...
Only top voted, non community-wiki answers of a minimum length are eligible