JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Effects of progressive resistance training and weight loss versus weight loss alone on inflammatory and endothelial biomarkers in older adults with type 2 diabetes.

PURPOSE: Type 2 diabetes has been associated with an increase in inflammatory and endothelial biomarkers, which are associated with an increased risk of cardiovascular disease and diabetes-related complications. This study examined the effects of high-intensity progressive resistance training (PRT) with moderate weight loss (WL) versus WL alone on inflammatory and endothelial biomarkers in older overweight adults with type 2 diabetes.

METHODS: This was a 12-month randomized controlled trial in which 36 inactive, overweight adults aged 60-80 years with poorly controlled type 2 diabetes were randomized to 6 months of supervised PRT + WL or stretching (sham) exercise plus WL followed by 6 months of home-training without dietary modification. Fasted blood samples were collected at baseline and subsequent 3-month intervals with the following inflammatory [interleukin (IL)-10, IL-6, tumor necrosis factor (TNF)-α, adiponectin] and endothelial markers [resistin and intercellular adhesion molecule (ICAM)-1)] assessed.

RESULTS: No significant within-group changes or between-group differences were detected for any inflammatory or endothelial biomarker following the 6-month supervised exercise and WL phase. There was a greater reduction in IL-10 at 9 months in the PRT + WL relative to WL group (P = 0.033). There was also a greater reduction in TNF-α at 9 and 12 months in the PRT + WL relative to WL group (P = 0.026 and P = 0.024, respectively). Serum adiponectin increased in the PRT + WL relative to WL group after 12 months (P = 0.036). All results were adjusted for baseline values, age, weight, sex, diabetes duration, medication use and any change in medication.

CONCLUSIONS: Long-term participation in PRT, independent of change in weight, can result in some improvements in certain inflammatory markers in older overweight adults with type 2 diabetes.

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