Abstract
ABSTRACTBackground: Being more specific about individual food choices may be advantageous for weight loss. Including a healthy food (e.g. walnuts) may help to expose effects.Objective: To examine the impact of including walnuts in diets for weight loss.Design: Secondary analysis of the HealthTrack lifestyle intervention trial. Overweight and obese participants were randomized to: usual care (C), interdisciplinary intervention including individualized dietary advice (I), or interdisciplinary intervention including 30 g walnuts/day (IW). Changes in body weight, energy intake, intake of key foods, physical activity, and mental health over three and 12 months were explored.Results: A total of 293 participants completed the intensive three-month study period, and 175 had data available at 12 months. The IW group achieved the greatest weight loss at three months. IW reported significant improvements in healthy food choices, and decreased intakes of discretionary foods/beverages, compared to C. Weight loss remained greatest in IW at 12 months.Discussion: Significant effects were seen after three months, with the IW group achieving greater weight loss and more favorable changes in food choices.Conclusions: Including 30 grams walnuts/day in an individualized diet produced weight loss and positive changes in food choice.
Highlights
In the clinical setting, lifestyle interventions that focus on dietary, physical activity, and psychological components are the most effective in promoting weight loss [1]
This was a secondary analysis of the HealthTrack study, a 12-month randomized controlled trial that tested the effect of an interdisciplinary intervention on weight loss in overweight and obese adults [19]
As this was a per protocol analysis, one participant who was randomized to I but provided with walnuts was treated as including g walnuts/day (IW) for subsequent analyses
Summary
Lifestyle interventions that focus on dietary, physical activity, and psychological components are the most effective in promoting weight loss [1]. Translating dietary guidelines into food choices that suit an individual’s usual eating pattern may be more helpful than general advice. Being more specific about individual food choices may be advantageous for weight loss. Including a healthy food (e.g. walnuts) may help to expose effects. Overweight and obese participants were randomized to: usual care (C), interdisciplinary intervention including individualized dietary advice (I), or interdisciplinary intervention including 30 g walnuts/day (IW). The IW group achieved the greatest weight loss at three months. Discussion: Significant effects were seen after three months, with the IW group achieving greater weight loss and more favorable changes in food choices
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