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Rationale and design of REWARD (revving-up exercise for sustained weight loss by altering neurological reward and drive): a randomized trial in obese endometrial cancer survivors.

ABSTRACT: Obesity is a leading risk factor for endometrial cancer (EC), particularly Type I forms, which are increasing in the U.S. Although death rates from most cancers have been decreasing, overall mortality in EC is increasing in the U.S. EC survivors' poor fitness combined with their surgical treatments may make weight loss particularly challenging. High intensity exercise increases neurotrophins and neurological reward via altered striatal dopamine in animals, and, in humans, chronic high intensity exercise enhances meal-induced satiety and may reduce hedonic eating. "Assisted" exercise, a mode of exercise whereby a patient's voluntary exercise rate is augmented mechanically, may modulate brain dopamine levels in Parkinson's Disease patients but has not been previously evaluated as a treatment for obesity.We describe the rationale and design of the REWARD trial, which has the overarching goal of randomizing 120 obese EC survivors to "assisted" or voluntary rate cycling to evaluate the efficacy of "assisted" exercise in enhancing and sustaining weight loss. Patients in both arms will receive 3 days/week of supervised exercise and 1 day/week of a group dietary behavioral intervention for 16 weeks and, then, will be followed for 6 months.The primary outcome is weight loss. Secondary outcomes include measures for body composition, fitness, eating behavior, exercise motivation and, quality of life as well as cognition and food reward and motivation as assessed by functional magnetic resonance imaging (fMRI) tasks.If successful, the REWARD program could be extended to help sustain weight loss in obese cancer and non-cancer patients.

SUBMITTER: Nock NL

PROVIDER: S-EPMC4294324 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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Rationale and design of REWARD (revving-up exercise for sustained weight loss by altering neurological reward and drive): a randomized trial in obese endometrial cancer survivors.

Nock Nora L NL Dimitropoulos Anastasia A Rao Stephen M SM Flask Chris A CA Schluchter Mark M Zanotti Kristine M KM Rose Peter G PG Kirwan John P JP Alberts Jay J

Contemporary clinical trials 20140817 2

<h4>Background</h4>Obesity is a leading risk factor for endometrial cancer (EC), particularly Type I forms, which are increasing in the U.S. Although death rates from most cancers have been decreasing, overall mortality in EC is increasing in the U.S. EC survivors' poor fitness combined with their surgical treatments may make weight loss particularly challenging. High intensity exercise increases neurotrophins and neurological reward via altered striatal dopamine in animals, and, in humans, chro ...[more]

PMID: 25139726

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Project description:OBJECTIVE:Healthy eating and physical activity may help endometrial cancer survivors (ECS) improve their quality of life. However, most ECS do not meet the relevant guidelines. This pilot trial aimed to test the study feasibility procedures for a definitive trial of a behavioural lifestyle programme. DESIGN AND SETTING:This 24-week parallel two-arm randomised pilot trial took place in two hospitals in London, UK (April 2015-June 2016). PARTICIPANTS:Sixty disease-free ECS within 3 years of diagnosis. INTERVENTIONS:Participants were randomised using minimisation to receive the intervention or care as usual. The 'Shape-Up following cancer treatment' programme used self-monitoring, goal-setting, self-incentives, problem-solving and group social support for 12?hours over 8 weeks to help survivors improve their eating and physical activity. OUTCOME MEASURES:The main outcome measures were recruitment, adherence, and retention rates. Further outcomes included barriers to participation and feedback on programme satisfaction. RESULTS:Of the 296 potentially eligible ECS, 20% (n=60) were randomly allocated to the active intervention (n=29) or control group (n=31). Three participants in each arm were deemed ineligible after randomisation and excluded from analysis. Twenty participants (77%; 95%?CI 61% to 93%) adhered to the intervention and provided generally favourable feedback. At 24 weeks, 25/26 (96%; 95%?CI 89% to 100%) intervention and 24/28 (86%; 95%?CI 73% to 99%) control participants completed their assessment. No intervention-related adverse events were reported. Among eligible survivors who declined study participation (n=83), inconvenience (78%; 95%?CI 69% to 87%) was the most common barrier. CONCLUSIONS:The trial was feasible to deliver based on the a priori feasibility criteria. Enhancing recruitment and adherence in a definitive trial will require designs that promote convenience and consider ECS-reported barriers. TRIAL REGISTRATION NUMBER:NCT02433080; Pre-results. TRIAL FUNDING:University College London, St. Bartholomew's Hospital Nurses League, and NIHR University College London Hospitals Biomedical Research Centre.

Dataset Information

Rationale and design of REWARD (revving-up exercise for sustained weight loss by altering neurological reward and drive): a randomized trial in obese endometrial cancer survivors.

Publications

Rationale and design of REWARD (revving-up exercise for sustained weight loss by altering neurological reward and drive): a randomized trial in obese endometrial cancer survivors.

Similar Datasets

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