Treatment adherence
Mean total number of days per week that participants self-monitored their PA, mean proportion of participants who self-monitored PA at least one day per week, and mean proportion who self-monitored PA all 7 days per week using their Fitbit, were calculated for both the 12-week intervention period and 40-week post-intervention period. An accumulated step count of 500 or more on any given day represented a valid day of self-monitoring [