Marques, Marta MoreiraDe Gucht, VéroniqueMaes, StanGouveia, Maria João Pinheiro MoraisLeal, Isabel Pereira2012-10-202012-10-202012Psychology, Community & Health, 1 (2), 212-2202182-438xhttp://hdl.handle.net/10400.12/1784Aim: The aim of the present study was to analyze the reliability and factorial validity of the Portuguese Version of the Treatment Self-Regulation Questionnaire for physical activity (TSRQ-PA). Method: In this study, 148 healthy adults (Mean age = 44.70, 96.6% women) and 89 chronic fatigue patients (Mean age = 47.39, 97.8% women) filled out questionnaires related to behaviour regulation style (TSRQ – PA) and physical activity. Results: The confirmatory factor analysis adjustment indices of a two-factor structure (Autonomous Regulation scale and Controlled Regulation scale) of the TSRQ-PA were satisfactory and internal consistency estimates were acceptable for both factors. A higher degree of autonomous behaviour regulation was significantly associated with higher levels of physical activity. Conclusion: These findings provide support for the validity and reliability of the TSRQ – PA for measuring behaviour regulation style for engaging in physical activity, in different settings.engPhysical activityMotivationBehaviour regulation styleValidityReliabilityjournal article