Efficacy of a randomized trial examining commercial weight loss programs and exercise on metabolic syndrome in overweight and obese women
2017
Baetge, Claire | Earnest, Conrad P. | Lockard, Brittanie | Coletta, Adriana M. | Galvan, Elfego | Rasmussen, Christopher | Levers, Kyle | Simbo, Sunday Y. | Jung, Y Peter | Koozehchian, Majid | Oliver, Jonathan | Dalton, Ryan | Sanchez, Brittany | Byrd, Michael J. | Khanna, Deepesh | Jagim, Andrew | Kresta, Julie | Greenwood, M. W. | Kreider, Richard B.
While commercial dietary weight-loss programs typically advise exercise, few provide actual programing. The goal of this study was to compare the Curves Complete 90-day Challenge (CC, n = 29), which incorporates exercising and diet, to programs advocating exercise (Weight Watchers Points Plus (WW, n = 29), Jenny Craig At Home (JC, n = 27), and Nutrisystem Advance Select (NS, n = 28)) or control (n = 20) on metabolic syndrome (MetS) and weight loss. We randomized 133 sedentary, overweight women (age, 47 ± 11 years; body mass, 86 ± 14 kg; body mass index, 35 ± 6 kg/m²) into respective treatment groups for 12 weeks. Data were analyzed using chi square and general linear models adjusted for age and respective baseline measures. Data are means ± SD or mean change ± 95% confidence intervals (CIs). We observed a significant trend for a reduction in energy intake for all treatment groups and significant weight loss for all groups except control: CC (−4.32 kg; 95% CI, −5.75, −2.88), WW (−4.31 kg; 95% CI, −5.82, −2.96), JC (−5.34 kg; 95% CI, −6.86, −3.90), NS (−5.03 kg; 95% CI, −6.49, −3.56), and control (0.16 kg, 95% CI, −1.56, 1.89). Reduced MetS prevalence was observed at follow-up for CC (35% vs. 14%, adjusted standardized residuals (adjres.) = 3.1), but not WW (31% vs. 28% adjres. = 0.5), JC (37% vs. 42%, adjres. = −0.7), NS (39% vs. 50% adjres. = −1.5), or control (45% vs. 55% adjres. = −1.7). While all groups improved relative fitness (mL·kg⁻¹·min⁻¹) because of weight loss, only the CC group improved absolute fitness (L/min). In conclusion, commercial programs offering concurrent diet and exercise programming appear to offer greater improvements in MetS prevalence and cardiovascular function after 12 weeks of intervention.
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