Document Type : Original Article
Authors
1
PhD student in sports physiology, Department of Sports Physiology, Faculty of Sports Sciences, Mazandaran University, Babolsar, Iran
2
Associate Professor of Sports Physiology, Department of Sports Physiology, School of Sports Sciences, Mazandaran University, Babolsar, Iran
3
Department of Exercise Physiology, Physical Education Faculty, University of Mazandaran, Babolsar, Iran
10.22034/spmi.2024.426578.2548
Abstract
Muscular atrophy is considered one of the most important complications caused by type 2 diabetes. Regarding the role of resistance training in muscle hypertrophy, this study aimed to show the effect of 8 weeks of resistance training at two different volumes on the expression of follistatin and myostatin genes in the Flexor hallucis longus muscle of male rats with type 2 diabetes.
In this study, 40 male Wistar rats were randomly divided into four groups (each group consisting of 10 subjects), which are: 1- Non-diabetic control group 2- Diabetic control group 3- Diabetic group with low volume training 4- Diabetic group with high volume training. After inducing diabetes by injecting streptozocin (30 mg per kilogram of body weight) and feeding with high-fat food, the subjects did resistance exercises with two low and high volumes 3 days a week for 8 weeks. The daily training program for the low volume training group included 2 times (sets) and 5 repetitions in each turn and for high volume, 4 turns and 5 repetitions in each turn. After sampling, the expression of follistatin and myostatin genes was investigated using RealTime-PCR method. In order to analyze the data, SPSS version 24 software was used to compare the differences between the groups, one-way analysis of variance and LSD post hoc test with a significant level (p≤0.05) were used.
The results of the present study showed that the induction of diabetes led to a significant increase in the expression of myostatin in the diabetic control group compared to the healthy control group (P=0.010). However, there was no significant change in the expression of follistatin in the diabetic control group compared to the healthy control group (P=0.385). The follistatin gene expression in the two diabetic groups of low and high volume training showed an increase compared to the diabetes control group, and the expression of myostatin gene in the two diabetic groups of low and high volume training showed a significant decrease compared to the diabetes control group. The active skeletal muscle weight also showed a significant increase in the two diabetic groups of low and high volume exercise compared to the diabetic control group (p<0.05).
It seems that resistance training in both low and high volumes, for a period of at least 8 weeks, reduces the expression of myostatin, increases follistatin and, as a result, increases muscle weight and improves health in diabetic patients.
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