Examination of the transtheoretical model and exercise in 3 populations

Objective: To examine differences in the processes of change and self-effic acy for exercise across the stages of change in 3 populations to determine its suitability for use in diverse groups. Methods: Cross-sectional survey design with population as a between-subjects variable: high school students (n=168), university undergraduate students (n=215), and employed adults (n =63). Results: ANOVAs revealed main effects of stage (p<.0001) and populati on (p<.001) in process use and serf-efficacy but no population by stage int eraction. Conclusions: The consistency of patterns of the TTM variables sup ports its potential for effective intervention in diverse populations.