Bmi Women List Bmi Questions:...what's Wrong?

Bmi questions:...what's wrong? - bmi women list

I am an athlete who trains 5 days a week ...

I have a small machine bmi (which you made by a company Omron: Omron Body Fat Analyzer Hbf-306)

when I was in the configuration of the machine in perameters following letter:

Gender: Female
Normal mode or athlete: Athletes
Height: 5'7
Weight: 128 kg
Age: 28

The machine comes back with an answer:

15.9% fat
BMI 20.1

The question I ask myself is this: even if I as a "normal" and not 16% body fat low enough registered? if they are less (weighing about 125 pounds) from the machine were 13%, it is "normal" ... You have to do something with me that an athlete? I've heard that women lose their monthly cycle when they are under 13% ... does not appear "normal" - Is there something wrong with the machine?