Comparison of consumer-grade wearable devices with a research-grade instrument for measuring physical activity in a free-living setting.

PLoS One · 2026 · PMC12928483 · PMID 41729926

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a slight trendno p-value reported

Conversely, Fitbit displayed a slight trend of increasing overestimation with higher mean values.

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showed a trendno p-value reported

The Apple Watch showed a trend of increasing underestimation as the mean MVPA increased.

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