Impact of a male‐only weight loss maintenance programme on social–cognitive determinants of physical activity and healthy eating: A randomized controlled trial. (16th March 2015)

• Record Type: Journal Article
• Authors: Young, Myles D.; Plotnikoff, Ronald C.; Collins, Clare E.; Callister, Robin; Morgan, Philip J.
• Is Part Of: British journal of health psychology. Volume 20:Part 4(2015)
• Page Start: 724
• Page End: 744
• Publication Date: 2015-03-16
• Subjects: Clinical health psychology -- Periodicals; 613.019
• DOI: 10.1111/bjhp.12137
• Languages: English
• ISSNs: 1359-107X

Abstract

<abstract abstract-type="main" id="bjhp12137-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="bjhp12137-sec-0001" sec-type="section"> <title>Objectives</title> <p>To examine the effect of a gender‐tailored, Social Cognitive Theory (SCT)‐based weight loss maintenance (WLM) intervention on men's physical activity and healthy eating cognitions and behaviours in the 12 months after completing a weight loss programme.</p> </sec> <sec id="bjhp12137-sec-0002" sec-type="section"> <title>Design</title> <p>A two‐phase, assessor‐blinded, randomized controlled trial.</p> </sec> <sec id="bjhp12137-sec-0003" sec-type="section"> <title>Methods</title> <p>Ninety‐two overweight/obese men (mean [SD] age: 49.2 years [10.1], BMI: 30.7 [3.3] kg/m<sup>2</sup>) who lost at least 4 kg after completing the 3‐month SCT‐based <italic>SHED‐IT Weight Loss Program</italic> were randomly allocated to receive (1) the SCT‐based <italic>SHED‐IT WLM Program</italic>; or (2) no additional resources (self‐help control group). The 6‐month gender‐tailored <italic>SHED‐IT WLM Program</italic> was completely self‐administered and operationalized SCT behaviour change principles to assist men to increase moderate‐to‐vigorous physical activity (MVPA) and decrease energy‐dense, nutrient‐poor (discretionary) food consumption after initial weight loss. After randomization (WLM baseline), men were reassessed at 6 months (WLM post‐test) and 12 months (6‐month WLM follow‐up). SCT cognitions (e.g., self‐efficacy, goal setting), MVPA, and discretionary food consumption were assessed with validated measures.</p> </sec> <sec id="bjhp12137-sec-0004" sec-type="section"> <title>Results</title> <p>Following significant improvements in cognitions, MVPA and discretionary food consumption during the weight loss phase, intention‐to‐treat, linear mixed models revealed no significant group‐by‐time differences in cognitions or behaviours during the WLM phase. Initial improvements in MVPA and some cognitions (e.g., goal setting, planning, and social support) were largely maintained by both groups at the end of the study. Dietary effects were not as strongly maintained, with the intervention and control groups maintaining 57% and 75% of the Phase I improvements in discretionary food intake, respectively.</p> </sec> <sec id="bjhp12137-sec-0005" sec-type="section"> <title>Conclusions</title> <p>An additional SCT‐based WLM programme did not elicit further improvements over a self‐help control in the cognitions or behaviours for MVPA or discretionary food intake of men who had lost weight with a SCT‐based weight loss programme.</p> </sec> <sec id="bjhp12137-sec-0006" sec-type="section"> <p> <boxed-text content-type="box" id="bjhp12137-blkfxd-0001" position="anchor" orientation="portrait"> <label>Statement of contribution</label> <p> <italic> <bold>What is already known on this subject?</bold> </italic>Weight regain after weight loss (WL) is common. As successful weight loss maintenance (WLM) requires sustained improvements in cognitions and behaviours, health psychology can contribute to intervention development. However, little research has examined the utility of psychological theory in the context of a WLM randomised controlled trial.</p> <p> <italic> <bold>What does this study add?</bold> </italic> </p> <p> <list id="bjhp12137-list-0001" list-type="bullet"> <list-item> <p>A theory‐based WL program improved men's physical activity and dietary behaviours and cognitions.</p> </list-item> <list-item> <p>Men who also received a theory‐based WLM program did not show further improvements in physical activity or dietary cognitions and behaviours compared to those that did not.</p> </list-item> </list> </p> </boxed-text> </p> </sec> </abstract>