Adherence
A theory-based group weight loss intervention significantly increases dietary fiber intake, which mediates weight loss, but fails to significantly increase objectively measured physical activity despite improvements in self-efficacy and social support for activity.
This structured group program helps people increase fiber intake, which leads to weight loss. However, it does not significantly increase physical activity levels, even though participants feel more confident and supported in doing so. For weight loss, prioritize increasing fiber intake through this structured approach rather than relying solely on increased physical activity.
The intervention resulted in significant improvements in fiber intake (M between-group difference = 5.7 g/day, p < .001) but not fat consumption (−2.3 g/day, p = 0.13), that were predictive of weight loss at both four months... and 12 months... While participants reported improvements in motivational and social support variables, there was no effect of these, or of the intervention overall, on physical activity.
Why this rating
Randomized controlled pilot trial with process evaluation, though small sample size (N=108) and pilot nature limit generalizability.
Source
Processes of behavior change and weight loss in a theory-based weight loss intervention program: a test of the process model for lifestyle behavior change
Fiona Gillison et al. · International Journal of Behavioral Nutrition and Physical Activity · 2015
DOI 10.1186/s12966-014-0160-6
More from this paper
- Higher attendance (threshold of 5+ sessions) in a theory-based weight loss intervention is associated with significantly greater weight loss and fat reduction, demonstrating a dose-response relationship for attendance.Good
- Improvements in self-efficacy and understanding of the behavior change process mediate successful dietary change through engagement in coping planning and self-monitoring, but these same mediators do not translate to increased physical activity.Good
Related findings · Adherence
- Regular physical activity (at least 150 minutes/week of moderate-intensity) reduces all-cause and cardiovascular mortality by 20-30% and lowers the risk of type 2 diabetes by 25-35%.Strong
- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →