Intervention Periods	Time Periods	Description	Self-Report Measurement	Activity Tracker Wear
Pre-intervention: during CR, starting on the day the activity tracker was given and ending on the last day of CR	At least 4 weeks of CR; weekly summary of steps and physical activity minutes sent	Enrolled in study	Questionnaire #1	Activity tracker starts^a
		Discharge meeting with CR staff and with research staff	Questionnaire #2
Intervention: starting the day following cardiac rehabilitation discharge and ending on the day the last (sixth) report was sent	Week 1	Topic: weight tracking^b
	Week 2	Topic: sedentary behavior^b
	Week 3	Topic: heart rate^b
	Week 4	Topic: sleep tracking^b
	Week 5	Topic: connecting the activity tracker to other apps^b
	Week 6	Topic: resetting goals^b
Maintenance: starting the day following the last report and ending the last day of tracking by study staff	Day after last report	Contacted with instructions to change activity tracker password	Questionnaire #3	Activity tracker ends^a
	Approximately 4 weeks following the last report		Questionnaire #3	Activity tracker ends^a