Comparison of Physical Activity Measures Using Mobile Phone-Based CalFit and Actigraph
BackgroundEpidemiological studies on physical activity often lack inexpensive, objective, valid, and reproducible tools for measuring physical activity levels of participants. Novel sensing technologies built into smartphones offer the potential to fill this gap. ObjectiveWe sought to validate estim...
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JMIR Publications,
2013-06-01T00:00:00Z.
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