Most measuring devices that can be purchased have a HUGE error associated with them. one of the most accurate ways to get your body fat measured is at a facility that does underwater weighing.

as for fat burning zones - this is a bit of a misnomer. although you burn a higher percentage of fat at this zone, the total number of calories are low. but this is a good place for someone to start out at if they haven't exercised before.

and finally, both good exercise and eating habits are necessary to reduce body fat. by good eating habits i not only mean eating healthy, but also removing those foods you may have intolerances to. this needs to be diagnosed by a dietician.

my few cents

Han