Physical activity, exercise, and physical fitness: definitions and distinctions for health-related research.

Abstract “Physical activity,” “exercise,” and “physical fitness” are terms that describe different concepts. However, they are often confused with one […]

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Don’t Bank on Heart-Rate Accuracy From Your Activity Tracker

Wrist-worn activity trackers such as Fitbit don’t reliably assess heart rate, a new study finds. While the devices may have […]

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