Temporal Sequencing of Physical Activity Change Constructs within the Transtheoretical Model.

Objective: Studies support the Transtheoretical Model's (TTM) ability to describe behavior change processes and guide interventions; however, the temporal sequencing of constructs is less understood. This cohort study tested five sequences to identify TTM construct changes related to physical activity.

Methods: A random sample provided baseline data (=689; 63% female; ()=47(17); 37% white), with 401 participants providing 24-month data, at six-month intervals.