CUESTIONARIO DE EJERCICIO BASADO EN EL MODELO TRANSTEÓRICO DE LA CONDUCTA EN UNA MUESTRA MEXICANA 1 Exercise questionnaire based on the transtheoretical model of behavior in a Mexican sample

An exercise questionnaire based on the transtheoretical model of change developed by Prochaska and DiClemente was designed to measure the five stages of change of the model: precontemplation, contemplation, preparation, action, and maintenance. At first, items were written for each stage, and then an exploratory factor analysis determined the factor structure of the questionnaire. There were 951 participants from five Mexican cities, with a mean age of 28.76 years. The exploratory factor analysis indicated a factor structure composed of the five factors, being variable the range of the factor loadings. This questionnaire can be used to identify the stage of change in which a person is, and thus to implement specific interventions according to that stage.