A self-determination process model of physical activity adoption in the context of a randomized controlled trial |
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| Affiliation: | 1. School of Human Kinetics, University of Ottawa, Montpetit Hall, 125 University, Ottawa, Ontario, Canada K1N 6N5;2. School of Psychology, University of Ottawa, Canada;3. Institute of Population Health, University of Ottawa, Canada;4. Department of Medicine, University of Rochester, USA;5. Department of Clinical and Social Science in Psychology, University of Rochester, USA;1. Centre for Exercise, Nutrition & Health Sciences, School for Policy Studies, University of Bristol, 8 Priory Road, Bristol, BS8 1TZ, UK;2. Bristol Randomised Trials Collaboration, School of Social & Community Medicine, University of Bristol, Bristol, BS8 2PS, UK;3. Health and Social Sciences, University of the West of England, Bristol, UK;1. KU Leuven – University of Leuven Department of Rehabilitation Sciences, Tervuursevest 101, 3001 Leuven, Belgium;2. UPC KU Leuven, Campus Kortenberg, KU Leuven – University of Leuven Department of Neurosciences KU Leuven, Leuvensesteenweg 517, 3070 Kortenberg, Belgium;3. Psychotherapeutisch Centrum Rustenburg, Waggelwaterstraat 2, 8000 Brugge, Belgium;4. Psychiatrisch Ziekenhuis Duffel, Stationsstraat 22c, 2570 Duffel, Belgium;5. Psychiatrisch Centrum Bethanië, Andreas Vesaliuslaan 39, 2980 Zoersel, Belgium;6. Psychiatrisch Ziekenhuis Onze-Lieve-Vrouw, Koning Albert I laan 8, 8200 St Michiels, Brugge, Belgium;7. Algemeen Psychiatrisch Ziekenhuis Sint-Lucia, Ankerstraat 91, 9100 Sint-Niklaas, Belgium;8. Psychiatrisch Ziekenhuis Heilig Hart, Poperingseweg 16, 8900 Ieper, Belgium;9. School of Psychiatry, University of New South Wales, Sydney, Australia;10. School of Health and Social Care, University of Greenwich, Southwood Site Avery Hill Road, Eltham, London SE9 2UG, UK;1. School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Edgbaston B15 2TT, UK;2. School of Clinical and Experimental Medicine, University of Birmingham, Edgbaston B15 2TT, UK |
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| Abstract: | Objective: The PA Counseling (PAC) trial tested a primary care intervention using Self-Determination Theory (SDT) as the guiding framework. This paper presents specific results related to SDT constructs in a physical activity (PA) context. Specifically, whether patients who received both brief autonomy supportive PA counseling from their health-care provider and intensive (3 month) autonomy supportive counseling from a PA counselor would report greater levels of autonomy support, autonomous motivation, perceived competence and PA adoption, than patients receiving only brief counseling. In addition, we tested Williams’ SDT process model in the context of PA adoption.Method: Measures of autonomous motivation and perceived competence for PA were measured at baseline and 6 weeks. PA was assessed at baseline and 13 weeks. An autonomy support index was calculated by multiplying minutes of counseling by perceptions of autonomy support. Group differences in autonomy support, autonomous motivation, perceived competence and PA were examined. The SDT process model of PA adoption was tested via path analysis.Results: The results showed higher autonomy support and autonomous motivation at 6 weeks and higher PA levels at 13 weeks for the experimental group. The SDT process model for PA adoption showed that autonomous motivation and perceived competence at 6 weeks significantly predicted 13-week PA for the experimental group.Conclusions: This study provides a rigorous field test of SDT theory in a PA context. It demonstrates the versatility and applicability of the SDT model for health behavior change. SDT-trained PA counselors appear to provide valuable contribution to facilitating patient behavior change, by increasing patient autonomous motivation for PA. |
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