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Rugby Fans in Training New Zealand (RUFIT-NZ): protocol for a randomized controlled trial to assess the effectiveness and cost-effectiveness of a healthy lifestyle program for overweight men delivered through professional rugby clubs in New Zealand.
Maddison, R, Hargreaves, EA, Jiang, Y, Calder, AJ, Wyke, S, Gray, CM, Hunt, K, Lubans, D, Eyles, H, Draper, N, et al
Trials. 2020;(1):139
Abstract
BACKGROUND A healthy lifestyle program that appeals to, and supports, obese New Zealand (NZ) European, Māori (indigenous) and Pasifika men to achieve weight loss is urgently needed. In Scotland, Football Fans in Training (FFIT), a weight management and healthy lifestyle program for overweight and obese men aged 35-65 years , delivered by community coaching staff at professional football clubs, has been shown to be beneficial and cost-effective. A pilot program inspired by FFIT but delivered by professional rugby clubs in NZ (n = 96) was shown to be effective in weight loss, improved physiological outcomes, and adherence to healthy lifestyle behaviors in overweight and obese men. The objective of this trial is to determine the effectiveness and cost-effectiveness of the Rugby Fans in Training New Zealand (RUFIT-NZ) program. METHODS A pragmatic, two-arm, multi-center, randomized controlled trial involving 308 overweight and obese men aged 30-65 years, randomized to either an intervention group (n = 154) or a wait-list control group (n = 154). The intervention-group participated in the 12-week RUFIT-NZ program, a gender-sensitized, healthy lifestyle intervention adapted to the environment and cultural diversity of NZ and delivered through professional rugby clubs. Participants in the intervention group undergo physical training sessions, in addition to workshop-based sessions to learn about nutrition, physical activity, sleep, sedentary behavior, and a range of behavior-change strategies for sustaining a healthier lifestyle. The control group receives the program after 52 weeks. The primary outcome is change in body weight from baseline to 52 weeks. Secondary outcomes include change in body weight at 12 weeks; waist circumference, blood pressure, fitness, and lifestyle behaviors at 12 and 52 weeks; and cost-effectiveness. A process evaluation informed by the RE-AIM framework will evaluate potential implementation of RUFIT-NZ as an ongoing program in NZ after the trial. DISCUSSION This trial will investigate the effectiveness and cost-effectiveness of the RUFIT-NZ program in overweight and obese NZ men. TRIAL REGISTRATION Australia New Zealand Clinical Trials Registry, ACTRN12619000069156. Registered on 18 January 2019, according to the World Health Organization Trial Registration Data Set. Universal Trial Number, U1111-1245-0645.
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Evaluation of a community-based behavioral weight loss program in Chinese adults: A randomized controlled trial.
Yang, Z, Yu, Z, Jiang, Y, Bai, Y, Miller-Kovach, K, Zhao, W, Foster, GD, Chen, C
Obesity (Silver Spring, Md.). 2016;(7):1464-70
Abstract
OBJECTIVE Weight losses between a group of participants assigned to a weight loss program based in the community [i.e., specifically the methodology used by Weight Watchers (WW)] and a Nutrition Education (NE) control group were compared in this study. METHODS In this 6-month trial, 300 participants with overweight or obesity were recruited from Beijing city, China, and randomly assigned to the WW or NE group. Weight, waist circumference, and biochemical parameters were assessed at baseline and 6 months. RESULTS At 6 months, the majority of participants (79% for WW; 89% for NE) completed the study. WW participants lost significantly more weight than the NE group (-4.2 ± 5.6 kg vs. -0.6 ± 3.6 kg). More WW participants lost 5% or 10% of their starting weight [≥5%: 52.0% of WW participants vs. 11.3% of NE participants (odds ratio 8.15, 95% CI: 4.43-14.97)]; [≥10%: 26.0% of WW vs. 3.3% of NE participants (odds ratio 9.39, 95% CI: 3.55-24.83)]. In addition, WW participants reduced waist circumference by 3.9 ± 6.3 cm, while the NE group increased waist circumference by 0.6 ± 5.5 cm. CONCLUSIONS The WW program was associated with clinically significant weight loss, demonstrating its potential value as an intervention strategy, based in the community, for the treatment of obesity in China.
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Impact of vitamin D supplementation during a resistance training intervention on body composition, muscle function, and glucose tolerance in overweight and obese adults.
Carrillo, AE, Flynn, MG, Pinkston, C, Markofski, MM, Jiang, Y, Donkin, SS, Teegarden, D
Clinical nutrition (Edinburgh, Scotland). 2013;(3):375-81
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Abstract
BACKGROUND & AIMS The impact of vitamin D supplementation in overweight and obese adults during resistance training on body composition, muscle function, and glucose tolerance was investigated. METHODS Twenty-three overweight and obese (age: 26.1±4.7 y; BMI: 31.3±3.2 kg/m(2); 25-hydroxyvitamin D: 19.3±7.2 ng/mL) adults were recruited for participation in a double-blind, placebo-controlled trial. Participants were randomly divided into vitamin D (VitD, 4000 IU/d; 5 females, 5 males) and placebo (PL; 7 females, 6 males) groups. Both groups completed 12 weeks of resistance training. 25-hydroxyvitamin D, parathyroid hormone, body composition, and glucose tolerance were assessed at baseline and 12 weeks. Muscle function (strength and power) was assessed at baseline, 4, 8, and 12 weeks. RESULTS During the intervention, 25-hydroxyvitamin D increased and parathyroid hormone decreased in the VitD group (P<0.05). Peak power was significantly increased at 4 weeks in the VitD group only (P<0.05). Regression analysis revealed an inverse association between the change in 25-hydroxyvitamin D with the change in waist-to-hip ratio (R(2)=0.205, P=0.02). No other improvements were observed with supplementation. CONCLUSIONS Vitamin D supplementation in overweight and obese adults during resistance training induced an early improvement in peak power, and elevated vitamin D status was associated with reduced waist-to-hip ratio. CLINICAL TRIAL REGISTRATION NUMBER NCT01199926.