I don't understand why people are messuring NBPEL it's so imprecise/inexact.
You have no fixed point to messure against, so dependent on how hard you push your ruler against the skin & fat, you get different values.

If you can't messure 3 times and get the exact same value, it's not accurate.
 
I don't understand why people are messuring NBPEL it's so imprecise/inexact.
You have no fixed point to messure against, so dependent on how hard you push your ruler against the skin & fat, you get different values.

If you can't messure 3 times and get the exact same value, it's not accurate.

I had to make the last sentence bold. It's the reason why bone press measurement is accurate.
 
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