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A comment on Brains of overweight people look ten years older than those of lean peers. Parent comment

Re:Brains of overweight people look ten years older than tho... by suprathreshold on Friday August 05, 2016 @10:57AM (#12232784)
Maybe bargl means Bioelectric Impedance Analysis? A cursory internet search also indicates BIA is suspect as a one-time measure.
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Re:Brains of overweight people look ten years older than tho... by bargl on Friday August 05, 2016 @11:00AM (#12232806)
OK so I have this and I thought that the BMI it computed was based on tracking the fat to everything else based on BIA. But I may be way off here.

https://www.fitbit.com/aria

I see that Fitbit tracks this as BodyFat % not BMI. Not sure if that's accurate.

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Re:Brains of overweight people look ten years older than tho... by raffy on Friday August 05, 2016 @05:55PM (#12235982)
BIA is pretty bad. Here are ~1300 Fitbit Aria measurements matched against 7 DXA scans. The Fitbit bodyfat data (teal) is just random noise and can barely detect considerable changes in body composition.

http://i.imgur.com/J4Ls2bQ.png

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