I dont get it. Everyone here is saying that everyone else are liars. So you're saying that those expensive toys that they have at the gym are only 50 % accurate +- 10%? What the hell is that supposed to mean?
The "instrument" that i used, is a digital thing that you hold in your hands. You input your weight, your hieght, and your age (we measured my weight and hieght on one of the traditional scales you see at the doctors office. Not the digital or step on scales that spin with an arrow pointing to the weight.
It had two metal plates on it that you put your hands on top of then it takes like 20 seconds and calculates the BF%.
It looked like this:
They can't be completely inaccurate.
And even if they are. Example: A teenager that is usually skin and bones, because some teenagers have REALLY high metabolism. Starts to work out, 5 times a week, and plays a competitive sport 2-4 times a week as well. Who's to say that that kid doesn't have around 8% body fat?
He probably only had 10-15% to start with...