Figure 2.

Differences between concussed and nonconcussed control athletes in select physical activity metrics over time. Activity of the concussed group was stratified into 4 bins to illustrate changes in activity over time. Activity of the control group was averaged across the entire 2-week study period. A, Mean daily number of steps as recorded by the Fitbit (Fitbit Charge HR version 122; Fitbit, San Francisco, CA). B, Mean daily number of minutes spent in moderate to vigorous physical activity as recorded by the Fitbit. C, Mean daily number of minutes spent in moderate to vigorous physical activity as reported in the mobile survey. The error bars indicate the means and standard errors for the concussed-group activity. The solid horizontal lines indicate the means for control-group activity. The dotted horizontal lines indicate the standard errors of the means for control-group activity.