Comparison of consumer-grade wearable devices with a research-grade instrument for measuring physical activity in a free-living setting
Fig 2
Scatter plots comparing activity data from the ActiGraph GT9X device with those of consumer-grade wearable devices.
The panels are arranged by metric in rows (top: step count; middle: MVPA; bottom: PAEE) and by device in columns (left: Apple Watch; middle: Fitbit; right: Oura Ring). Each panel displays a scatter plot comparing data from a consumer-grade device (y-axis) against the criterion ActiGraph GT9X (x-axis). The solid line in each plot represents the line of best fit from linear regression.