Table 2.

Characteristics of intervention and comparators of included studies.

Study Name, Year	Intervention Device	Intervention	Comparator
Ashe, 2016 [20]	Fitbit	26 weeks of group-based education, social support, individualized physical activity prescription, given Fitbit	26 weeks: only received health-related information
Buis, 2017 [21]	Jawbone Up24	Received a Jawbone Up24 monitor, a tablet with Jawbone Up app installed, and brief weekly telephone counseling	Waitlist control (did not receive any intervention until after their final assessment where they were provided the intervention in full)
Cadmus-Bertram, 2015 [22]	Fitbit	16 weeks of Web-Based Tracking Group: Fitbit, instructional session, follow-up call at the fourth week	16 weeks of standard pedometer
Godino, 2013 [23]	Combined HR monitor and accelerometer (Actiheart)	8 weeks of wearing of Actiheart with one of three different types of feedback (simple, visual, contextualized)	8 weeks of wearing of Actiheart but with no feedback until the end of the trial
Hurling, 2007 [24]	Wrist-worn accelerometer	9 weeks of wristworn accelerometer, weekly exercise schedule, email reminders, real-time feedback via the internet	9 weeks of wrist-worn accelerometer with no feedback
Jakicic, 2016 [25]	FIT Core; BodyMedia	24 weeks of enhanced intervention: wearable technology, accompanying web interface to monitor diet and physical activity	24 weeks of standard intervention: website for self-monitoring of diet and physical activity
Martin, 2015 [26]	Fitbug Orb	3-arm study Phase 1 (1 week): blinded run-in Phase 2 (2 weeks): unblinded versus blinded tracking Phase 3 (2 weeks): smart texts versus no texts	Blinded participants with no feedback
Melton, 2016 [27]	Jawbone UP	6 weeks of wearing Jawbone UP band and engaging with the application daily with weekly reminders	6 weeks of using MyFitnessPal application
Poirier, 2007 [28]	Variety of activity trackers	2-arm study 6 weeks of walking program, Walkadoo, and wireless activity tracker 1 week of follow-up with wearing of activity tracker for at least 10 hours a day	2-arm study 6 weeks of not wearing activity trackers and maintaining daily activity routine 1 week of follow-up wearing of activity tracker for 10 hours a day
Shrestha, 2013 [29]	Polar FA20 accelerometer	1 time 1.5-hour lifestyle instruction and 26 weeks of continuous accelerometer use and feedback	26 weeks of self-directed exercise and/or US Army mandated physical training
Thompson, 2014 [30]	Fitbit	26 weeks of accelerometer use and feedback, weekly brief telephone counseling sessions focused on accelerometer feedback, 6 in-person brief counseling sessions	26 weeks of accelerometer without feedback
Thorndike, 2014 [31]	Fitbit e3	2-arm study Phase 1: 6 weeks RCTa comparing daily steps displaying feedback about steps and energy consumed Phase 2: 6 weeks non-RCT team steps competition where all participants wore monitors with feedback	2-arm study Phase 1: 6 weeks blinded monitor Phase 2: 6 weeks non-RCT team steps competition where all participants wore monitor with feedback

^aRCT: randomized controlled trial.