Abstract
[Purpose]In the present pilot study, we aimed to investigate the effects of the Silverrobics exercise program, which is similar to aerobic dance, on the factors related to glucose metabolism and liver enzymes.[Methods]Eight elderly women with obesity and impaired fasting glucose participated in the Silverrobics exercise program (60 minutes per session for five times a week for 8 weeks). The program was conducted at 50–60% of the heart rate reserve at 1 to 2 weeks and at 60–80% of the heart rate reserve at 3 to 8 weeks. To verify the effect of this 8-week exercise program on glucose metabolism and liver enzymes, blood analysis at pre- and post-training was performed.[Results]After the Silverrobics exercise program, there were significant decreases in the glucose (p<0.05), glycated hemoglobin A1c (p<0.05), 1,5-anhydroglucitol (p<0.05), and insulin levels (p<0.01) and homeostatic model assessment of insulin resistance score (p<0.05). However, there were no significant effects on the liver enzymes, except for alkaline phosphatase. The alkaline phosphatase level increased after the Silverrobics exercise program (p<0.05).[Conclusion]Although the Silverrobics exercise program had no beneficial effects on the liver enzymes, it may play an important role in preventing liver diseases considering the effects on glucose metabolism.
Highlights
Obesity has become a global public health problem
nonalcoholic fatty liver disease (NAFLD) should be prevented because it can progress to nonalcoholic steatohepatitis (NASH), which can increase the risk of cirrhosis or even hepatocellular carcinoma (HCC)[15,16]
A previous study reported significant reductions in the AST and ALT levels, as well as the value of insulin resistance (IR), in Iranian men with NAFLD who adhered to an 8-week aerobic exercise or resistance exercise program[28]. These results demonstrate that both aerobic exercise and resistance exercise can alleviate the risk factors of liver diseases
Summary
Obesity has become a global public health problem. There is accumulating evidence that the prevalence of sarcopenic obesity in elderly women is higher than that in elderly men; early management of body composition with adequate lifestyle changes is more important for women than for men[6]. Epidemiological evidence suggests that menopausal transition is an important factor for increasing body weight and fat mass[7]. Liver diseases, such as nonalcoholic fatty liver disease (NAFLD), are strongly related to obesity[8,9,10,11]. The AST/ALT ratio is a critical risk factor for predicting liver damage because the levels of AST increase more than those of ALT when hepatocellular death increases[19]
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