BIA can only collect information from 2 points, or 4 points on the body. If its just a scale-type then it will run a current from your left foot, and collect data at your right foot. If you are using a more advanced version it might run the current up your left leg and collect at the right hand, or vice versa. It doesn’t know where the fat is, or how much of it there is. It just knows that somewhere between your left leg and right arm there is x amount of fat.
By comparison, on a DEXA Scan, every pixel on that image has a value, and that value will tell us how much fat, muscle and bone is in that pixel. This is how we are able to tell you that you have a given amount of muscle in your left arm vs your right, or how much fat you have around your organs (Visceral adipose tissue). We have literally thousands of data points in a DEXA scan.
So, the only ready way to get accurate measures is to come in to have a DEXA scan. I would say you can throw your BIA device away, but I do think it is good for one thing – i’m sure it will still accurately tell you how much you weigh.
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