Effectiveness of Fitbit-Based Interventions in Improving 24-hour Movement Behaviors: A Systematic Review and Meta-Analysis.

IntroductionAll activities performed by an individual over a 24-hour period can be classified into four categories-moderate-to-vigorous physical activity (MVPA), light physical activity (LPA), sedentary behavior (SB), and sleep-collectively referred to as 24-hour movement behaviors. Fitbit devices can not only monitor all components of 24-hour movement behaviors but are also cost-effective and reliable. The aim of this meta-analysis was to assess the impact of Fitbit-based interventions on 24-hour movement behaviors outcomes.MethodsTo identify studies that employed Fitbit devices as intervention tools to improve 24-hour movement behaviors, the following five electronic databases were searched: PubMed, Embase, SCOPUS, Cochrane Library, and Web of Science. Study quality was evaluated using the Cochrane Risk-of-Bias tool. Meta-analysis was performed using a random-effects model to assess the pooled effects of Fitbit-based interventions on MVPA, LPA, SB, and sleep.ResultsForty-five studies involving 5234 participants were included in this meta-analysis. Fitbit-based interventions can significantly increase MVPA (MD 4.44 min/day; 95% CI 2.77 to 6.10;