Project Impact: An Innovative Approach to Weight Loss Maintenance
Condition: Obesity; Weight Loss; Overweight
MeSH terms: Overweight; Body Weight; Weight Loss
Study type: Interventional

Summary: 
      The major goal of this project is to evaluate an innovative approach to obesity. This study
      will determine if behavioral treatment can be improved by 1) implementing a primary focus on
      PA following initial weight loss treatment, and 2) using a novel, acceptance-based approach
      to the promotion of PA.
    

Detailed description: 
      Most adults who engage in lifestyle modification find it difficult to maintain a high level
      of PA over the long-term, and most also find that weight regain is inevitable. The current
      portfolio of available interventions does not adequately address these challenges. This
      project is designed to test the effectiveness of an intervention that is specifically
      designed to enhance the ability to maintain, in the long-term, a level of PA high enough to
      achieve long-term weight loss maintenance.

      In the study, 300 obese adults will be recruited from the community and provided with 6
      months of group-based, standard behavioral treatment for induction of weight loss (Phase I).
      A 6-month Phase I was chosen so that all participants will have sufficient time to accomplish
      initial weight loss before Phase II begins, allowing Phase II to truly be a test of weight
      loss maintenance. In Phase II, participants will receive one of three interventions, to be
      delivered for an additional 12 months: 1) behavioral treatment, with the standard emphasis on
      maintaining changes in diet and PA (BT), 2) behavioral treatment, with a primary emphasis on
      using these skills to maintain PA (BT-PA), or 3) acceptance-based behavioral treatment, with
      a primary emphasis on using these skills to maintain PA (ABT-PA).

      Assessments will be conducted at baseline, 6 months, 18 months (end of treatment), 24 months
      (6-month follow-up), and 36 months (18-month follow-up).
    

Intervention name(s): Gold Standard Behavior Therapy for Weight Loss; Behavior Therapy for Weight Loss with Physical Activity Emphasis; Acceptance-based Behavior Therapy for Weight Loss with PA emphasis
Intervention type(s): Behavioral; Behavioral; Behavioral
Intervention description(s): Group- based behavioral treatment for weight loss and weight loss maintenance, with a standard emphasis on diet (65% of session) and physical activity goals (25% of session). Other weight loss behaviors such as self monitoring will be covered in the remaining time (10% of session).; Group-based behavioral treatment for weight loss and weight loss maintenance, with a larger emphasis on physical activity goals (65% of session) than eating-related goals (25% of session).Other weight loss behaviors such as self monitoring will be covered in the remaining time (10% of session).; Group-based, acceptance-based behavioral treatment for weight loss and weight loss maintenance, with a larger emphasis on physical activity goals (65% of session) than eating-related goals (25% of session).Other weight loss behaviors such as self monitoring will be covered in the remaining time (10% of session).
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary purpose: Treatment
Keywords: Obesity; Weight loss; Overweight