Theoretical, Critical, and Practical Reflections on the Long-Term Maintenance of Health Behavior Change.

This commentary is in response to Joseph, Daniel, Thind, Benitez and Pekmezi (2014). They reviewed randomized controlled trials (RCTs) that included long-term follow-up assessments at least 6 months post-intervention. Their main purpose was to understand which theory or model used by researchers could help explain the long-term maintenance of health behaviors once the intervention was withdrawn in trials focused on physical activity, dietary behavior, and excessive alcohol consumption. Results showed that social cognitive theory (SCT) and transtheoretical model (TTM) were used most often and associated with long-term behavior change compared to self-determination theory (SDT), theory of planned behavior (TPB), or the social-ecological model (SEM). SDT showed encouraging findings while the evidence was unclear for the TPB and the SEM. Here it is argued that scientists should continually reflect on the utility of theory over time and the efforts by Joseph and colleagues should be commended. It is also useful to distinguish theories, which are more specified and offer more generalized statements, than models. Models, such as the TPB and SEM, have incorporated elements of other theories but are typically viewed as tools to characterize behavior. For instance, in 10 studies reviewed by Joseph and colleagues the SCT and TTM were used in an integrative manner. An example of an integrated model is presented that incorporates elements of SDT, TPB, and SCT in an effort to highlight how integrating elements from multiple theories may be useful.