Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Proposed conceptual model based on an ecological framework that depicts participation in walking or exercising in natural environments (NE-based PA). In bold: predictors and mediators; in italic: control variables. Solid lines: hypothesized direct effects; dotted line: hypothesized indirect effects.
