Determinants of physical activity maintenance: a systematic review and meta-analyses

The aim of this study was to identify the psychosocial and socio-demographic determinants of physical activity maintenance (PAM) among adults by examining baseline differences between individuals who did and did not maintain physical activity participation over time (Part-I) and by examining how well combinations of psychosocial constructs and socio-demographic characteristics predict PAM (Part-II). Longitudinal and experimental studies (sample mean age 1864 years) published between 1980 and 2010 were included. Independent data extraction was performed by two reviewers. All pooled effect sizes were calculated with the inverse-variance method under the random-effects model assumption. A total of 31 and 22 studies met all inclusion criteria and were included in Part-I and Part-II meta-analysis, respectively. Maintainers had higher [standard mean difference (95%CI)] self-efficacy (0.62 [0.49, 0.76]) and intention (0.65 [0.52, 0.79]) compared with relapsers. Health status directly affected PAM and moderated the relationship between BMI, education as well as perceived negative consequences and PAM. The overall model adjusted R 2 [95%CI] for the prediction of PAM was 0.20 [0.14, 0.27]. The present findings suggest that beliefs about capabilities and motivation and goals are among the strongest variables associated with PAM. However, other variables rarely investigated so far (e.g., post-intentional constructs/self-regulatory processes) may also influence PAM.