Hello sir my body fat index is 29.8 and fat mass...

Dear Customer
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What is the fat mass ?
fat mass is the amount of fat in your body , relativly measured 
What is the body fat index ?
is the percentage shows the amount of body fat relativly to your height , and express how healthy your body are , and its especially used for athlets and people who is working out , whom usually aim to reach to less-fat-in-body goals 
- body fat index is :  (fat mass)/height² 

Where are you according to your BFI ?
- men :
1. under fat : less than 8 %
2. healthy : 8-19 %
3. over fat : more than 20 % ( which means you are here if you are a male )
- women :
1. underfat : less then 21%
2. healthy : 21 -33 % ( which means you are here if you are a female )
 
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Kind Regards