TY - JOUR
T1 - A randomized controlled trial to evaluate self-determination theory for exercise adherence and weight control
T2 - Rationale and intervention description
AU - Silva, Marlene N.
AU - Markland, David
AU - Minderico, Cláudia S.
AU - Vieira, Paulo N.
AU - Castro, Margarida M.
AU - Coutinho, Sílvia R.
AU - Santos, Teresa C.
AU - Matos, Margarida G.
AU - Sardinha, Luís B.
AU - Teixeira, Pedro J.
N1 - Funding Information:
The investigators are grateful to the Portuguese Science and Technology Foundation (grant number FCT-POCI/DES/57705/2004); Calouste Gulben-kian Foundation (grant number 65565/2004) and also the Oeiras City Council, Nestlé Portugal, and IBESA Portugal for their additional financial support
PY - 2008
Y1 - 2008
N2 - Background. Research on the motivational model proposed by Self-Determination Theory (SDT) provides theoretically sound insights into reasons why people adopt and maintain exercise and other health behaviors, and allows for a meaningful analysis of the motivational processes involved in behavioral self-regulation. Although obesity is notoriously difficult to reverse and its recidivism is high, adopting and maintaining a physically active lifestyle is arguably the most effective strategy to counteract it in the long-term. The purposes of this study are twofold: i) to describe a 3-year randomized controlled trial (RCT) aimed at testing a novel obesity treatment program based on SDT, and ii) to present the rationale behind SDT's utility in facilitating and explaining health behavior change, especially physical activity/exercise, during obesity treatment. Methods. Study design, recruitment, inclusion criteria, measurements, and a detailed description of the intervention (general format, goals for the participants, intervention curriculum, and main SDT strategies) are presented. The intervention consists of a 1-year group behavioral program for overweight and moderately obese women, aged 25 to 50 (and pre-menopausal), recruited from the community at large through media advertisement. Participants in the intervention group meet weekly or bi-weekly with a multidisciplinary intervention team (30 2 h sessions in total), and go through a program covering most topics considered critical for successful weight control. These topics and especially their delivery were adapted to comply with SDT and Motivational Interviewing guidelines. Comparison group receive a general health education curriculum. After the program, all subjects are follow-up for a period of 2 years. Discussion. Results from this RCT will contribute to a better understanding of how motivational characteristics, particularly those related to physical activity/exercise behavioral self-regulation, influence treatment success, while exploring the utility of Self-Determination Theory for promoting health behavior change in the context of obesity. Trial Registration. Clinical Trials Gov. Identifier NCT00513084.
AB - Background. Research on the motivational model proposed by Self-Determination Theory (SDT) provides theoretically sound insights into reasons why people adopt and maintain exercise and other health behaviors, and allows for a meaningful analysis of the motivational processes involved in behavioral self-regulation. Although obesity is notoriously difficult to reverse and its recidivism is high, adopting and maintaining a physically active lifestyle is arguably the most effective strategy to counteract it in the long-term. The purposes of this study are twofold: i) to describe a 3-year randomized controlled trial (RCT) aimed at testing a novel obesity treatment program based on SDT, and ii) to present the rationale behind SDT's utility in facilitating and explaining health behavior change, especially physical activity/exercise, during obesity treatment. Methods. Study design, recruitment, inclusion criteria, measurements, and a detailed description of the intervention (general format, goals for the participants, intervention curriculum, and main SDT strategies) are presented. The intervention consists of a 1-year group behavioral program for overweight and moderately obese women, aged 25 to 50 (and pre-menopausal), recruited from the community at large through media advertisement. Participants in the intervention group meet weekly or bi-weekly with a multidisciplinary intervention team (30 2 h sessions in total), and go through a program covering most topics considered critical for successful weight control. These topics and especially their delivery were adapted to comply with SDT and Motivational Interviewing guidelines. Comparison group receive a general health education curriculum. After the program, all subjects are follow-up for a period of 2 years. Discussion. Results from this RCT will contribute to a better understanding of how motivational characteristics, particularly those related to physical activity/exercise behavioral self-regulation, influence treatment success, while exploring the utility of Self-Determination Theory for promoting health behavior change in the context of obesity. Trial Registration. Clinical Trials Gov. Identifier NCT00513084.
UR - http://www.scopus.com/inward/record.url?scp=47949133274&partnerID=8YFLogxK
U2 - 10.1186/1471-2458-8-234
DO - 10.1186/1471-2458-8-234
M3 - Article
C2 - 18613959
AN - SCOPUS:47949133274
SN - 1471-2458
VL - 8
JO - BMC Public Health
JF - BMC Public Health
M1 - 234
ER -