Temporal Sequencing of Physical Activity Change Constructs within the Transtheoretical Model

Area of Science:

• Behavioral Science
• Health Psychology
• Public Health

Background:

• The Transtheoretical Model (TTM) is widely used to understand and guide behavior change interventions.
• The temporal sequencing of TTM constructs in relation to physical activity remains less understood.
• Identifying the correct sequence is crucial for optimizing intervention strategies.

Purpose of the Study:

• To investigate the temporal sequencing of Transtheoretical Model constructs.
• To identify the most effective sequence of TTM construct changes for physical activity behavior.
• To inform the development of targeted behavior change interventions.

Main Methods:

• A cohort study design was employed with a random sample.
• Baseline data were collected from 689 participants.
• Follow-up data were collected at six-month intervals for 24 months from 401 participants.
• Structural equation modeling was used to test five different sequences of TTM constructs.

Main Results:

• Several sequences demonstrated good model fit, including processes to cognitions to stage, processes to stage to cognitions, and a model incorporating self-efficacy/temptations to processes to decisional balance to stage.
• The sequence of cognitions to processes to stage did not fit the data well.
• The best-fitting models suggest a cyclical relationship between TTM constructs.

Conclusions:

• A cyclical model integrating TTM constructs for physical activity behavior change was identified.
• Intervention efforts should focus on modifying processes that influence cognitions (barrier self-efficacy, decisional balance).
• These cognitive changes subsequently lead to advancements in the stage of change, necessitating a renewed focus on processes.