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Fitness Tracker Study Mixed Results on Device Accuracy

You know all those calories your fitness tracker says you've been burning?

They may not be as accurate as you think.

A new study out of Iowa State University tested eight different activity monitors against a portable metabolic analyzer for accuracy.

Researchers found most trackers were reasonably accurate when it came to calorie-burn estimates -- but some more than others.

the most accurate devices of the eight tested were the bodymedia fit, followed by the fitbit zip and fitbit one.