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Validating motivational readiness for exercise behavior with adolescents.

R E Lee¹, C R Nigg, C C DiClemente

¹Stanford Center for Research in Disease Prevention at Stanford University School of Medicine, USA. relee@kumc.edu

Research Quarterly for Exercise and Sport

|January 5, 2002

Summary

This study validates the Transtheoretical Model

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Area of Science:

Behavioral Science
Exercise Psychology
Adolescent Health

Background:

The Transtheoretical Model (TTM) stages of change are widely used for adult exercise behavior.
Limited research exists on TTM staging for adolescent exercise readiness.
Validation is needed before extensive use in adolescent research.

Purpose of the Study:

To validate the TTM staging framework for assessing motivational readiness for exercise in adolescents.
To examine the relationship between TTM stages and reported exercise behavior in adolescent samples.
To compare the specificity of different staging algorithms.

Main Methods:

Two studies (N=819, N=184) with adolescent samples (mean age 15.0 and 18.6 years).
Assessed participants' stage of motivational readiness for exercise using TTM.

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Measured self-reported exercise behavior and intention.

Main Results:

Reported exercise behavior consistently increased across TTM stages in both studies.
Staging algorithms demonstrated good sensitivity for detecting exercise behavior.
An algorithm using specific activity criteria and immediate intention showed better specificity for the preparation stage.

Conclusions:

The findings support the validity of the TTM staging framework for measuring motivational readiness for exercise among North American adolescents.
The results highlight the importance of specific criteria in defining the preparation stage for adolescents.
This validated framework can facilitate further research on exercise behavior interventions for adolescents.