Date: 27-01-2006

Purpose: The purpose of this study is the validation in the Spanish context of the BREQ-2 (Behavioural Regulation in Exercise Questionnaire-2) scale, developed by Markland and Tobin1, from the point of view of the Self-determination Theory and to compare the effect of gender, age and exercise duration and mode. Method: For the validation of the instrument two studies were carried out (N = 250 and N = 311) with a total sample formed of 561 adults in the metropolitan area of the city of Murcia, Spain, who do non-competitive sport and physical activities. They were given the adaptation of the questionnaire BREQ-2 by Markland and Tobin1 to fill in. Results: After an exploratory factor analysis and a confirmatory factor analysis, an adaptation of the scale was obtained with 18 items and 5 factors with acceptable reliability coefficients and a total variance explained of 68.8%. The two highest assessed forms of behavioural regulation were intrinsic and identified, with the women showing more intrinsic regulation. Those that exercised for less time were th