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Your smartwatch isn't accurately counting how many calories you burn, study says

NPR | By Leila Fadel
Published September 22, 2026 at 4:44 AM EDT

A new study finds that consumer-grade fitness wearables are generally inaccurate when calculating calories burned. NPR's Leila Fadel speaks with the study's lead author Jason Kostrna.

Copyright 2026 NPR
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US / WorldMorning EditionNPR Health
Leila Fadel
Leila Fadel is a host of Morning Edition, as well as NPR's morning news podcast Up First.
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