Background: Research on physical activity and the physical environment is at the correlates
stage, so it is premature to attribute causal effects. This paper provides a conceptual …

Background: Researchers examining theory-based, physical activity (PA) interventions
postulate that interventions are effective by changing theoretical constructs hypothesized to …

Leading scientists in the physical activity intervention field both conceptualize as well as
operationalize concepts such as “moderators,”“mediators,” and “confounders” differently …

Issue addressed: This second paper continues to explore advanced statistical methods and
their application in health promotion research and evaluation of intervention programs; in …

Ecological models stress the importance of addressing health problems at multiple levels
and emphasize the interaction and integration of factors within and across all levels (ie …

We need better ways to “treat” inactivity (Figure 1). Inactivity is a common chronic condition
afflicting over half the US population, causing thousands of deaths and millions of days of …