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Activity Trackers Not as Accurate for Some Activities

(Iowa State University) Activity trackers can provide a good overall estimate of calories burned, but an Iowa State University study finds they're less accurate when measuring certain activities, such as strength training.
In this latest round of testing, a team of researchers in ISU's Department of Kinesiology tested four consumer fitness trackers -- Fitbit Flex, Nike+ FuelBand SE, Jawbone UP 24 and Misfit Shine -- to see how well they measured sedentary, aerobic and resistance activity. Two research monitors -- the BodyMedia Core and Actigraph GT3X+ -- were also included in the study.
Overall, the BodyMedia Core was the top performer with a rate of error of 15.3 percent. The Misfit Shine was the least accurate with a 30.4 percent error rate.
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