OBJECTIVE: To evaluate the effectiveness of wearable device interventions (eg, Fitbit) to improve physical activity (PA) outcomes (eg, steps/day, moderate to vigorous physical activity (MVPA)) in populations diagnosed with cardiometabolic chronic disease. DATA SOURCE: Based on Preferred Reporting Items for Systematic Reviews and Meta-Analyses, an electronic search of 5 databases (Medline, PsycINFO, Scopus, Web of Science, and PubMed) was conducted. STUDY INCLUSION AND EXCLUSION CRITERIA: Randomized controlled trials (RCTs) published between January 2000 and May 2018 that used a wearable device for the full intervention in adults (18+) diagnosed with a cardiometabolic chronic disease were included. Excluded trials included studies that used devices at pre-post only, devices that administered medication, and interventions with no prospective control group comparison. DATA EXTRACTION: Thirty-five studies examining 4528 participants met the inclusion criteria. Study quality and RCT risk of bias were assessed using the Cochrane Collaboration Tool. DATA SYNTHESIS: Meta-analyses to compute PA (eg, steps/day) and selected physical dispersion and summary effects were conducted using the raw unstandardized pooled mean difference (MD). Sensitivity analyses were examined. RESULTS: Statistically significant increases in PA steps/day (MD 2,592 steps/day; 95% confidence interval (CI) 1,689 to 3,496) and MVPA min/wk (MD 36.31 min/wk; 95% CI 18.33 to 54.29) were found for the intervention condition. CONCLUSION: Wearable devices positively impact physical health in clinical populations with cardiometabolic diseases. Future research using the most current technologies (eg, Fitbit) will serve to amplify these findings.

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