are these things reliable at all. My brother went to the gym last week for the first time in 2 years. While he was there he received a fit test. He was weighed in and stood on a scale with a handle tethered to it. He said it read his BF and LBM
He doesnt look that big to me However his report says he is 284 lbs with 35.9 bf I would have guess him at 25% or so.
Has anyone used these and are they accurate at all. thanks