%0 Journal Article
%T Aerobic exercise training improves insulin
%A CW James Melling
%A Earl G Noble
%A Jaume Padilla
%A Matthew W McDonald
%A Michelle S Dotzert
%A T Dylan Olver
%A Thomas J Jurrissen
%J Diabetes and Vascular Disease Research
%@ 1752-8984
%D 2019
%R 10.1177/1479164118815279
%X Vascular insulin resistance often precedes endothelial dysfunction in type 1 diabetes mellitus. Strategies to limit vascular dysfunction include intensive insulin therapy (4¨C9£żmM) and aerobic training. To avoid the risk of hypoglycaemia, individuals often prescribed conventional insulin therapy (9¨C15£żmM) and participate in resistance training. In a model of type 1 diabetes mellitus, this study examined insulin-induced vasomotor function in the aorta and femoral artery to determine (1) whether resistance training with conventional insulin therapy provides the same benefits as aerobic training with conventional insulin therapy, (2) whether aerobic training or resistance training, when paired with conventional insulin therapy, results in superior vasomotor function compared to intensive insulin therapy alone and (3) whether vessel-specific adaptations exist. Groups consisted of conventional insulin therapy, intensive insulin therapy, aerobic training with conventional insulin therapy and resistance training with conventional insulin therapy. Following multiple low doses of streptozotocin, male Sprague-Dawley rats were supplemented with insulin to maintain blood glucose concentrations (9¨C15£żmM: conventional insulin therapy, aerobic training and resistance training; 4¨C9£żmM: intensive insulin therapy) for 12£żweeks. Aerobic training performed treadmill exercise and resistance training consisted of weighted climbing. Coinciding with increased Akt signalling, aerobic training resulted in enhanced insulin-induced vasorelaxation in the femoral artery. Intensive insulin therapy displayed increased mitogen-activated protein kinase signalling and no improvement in insulin-stimulated vasorelaxation compared to all other groups. These data suggest that aerobic training may be more beneficial for limiting the pathogenesis of vascular disease in type 1 diabetes mellitus than merely intensive insulin therapy
%K Insulin resistance
%K endothelial dysfunction
%K physical activity
%K resistance exercise
%K treadmill exercise
%U https://journals.sagepub.com/doi/full/10.1177/1479164118815279