The Response of Plasma Levels of Atrogin-1 and Insulin-Like Growth Factor-1 to Low-Fat Milk Consumption after One Session of High-Intensity Interval Exercise in Fasting State among Overweight Young Men

Document Type : Original Article (s)

Authors

1 MSc Student, Department of Sport Sciences, School of Sport Sciences, University of Birjand, Birjand, Iran

2 Associate Professor, Department of Sport Sciences, School of Sport Sciences, University of Birjand, Birjand, Iran

3 Assistant Professor, Department of Sport Sciences, School of Sport Sciences, University of Birjand, Birjand, Iran

Abstract

Background: The aim of this study was assessing the response of plasma levels of atrogin-1 and insulin-like growth factor-1 to low-fat milk consumption after one session of high-intensity interval exercise in fasting state among overweight young men.Methods: Ten overweight young men (mean age: 20.50 ± 1.71 years and body mass index: 28.08 ± 2.80 kg/m2) were randomly selected. They were participated in two exercise sessions of two non-consecutive days. The exercise program in each day included 4 sets of 30-second Wingate test with 4.5 minutes active rests between sets. The difference was that in the second session, immediately after exercise, participants drank 500 ml of low-fat milk. Blood samples were taken before exercise and 5, 90 and 180 minutes after it. Data were analyzed using analysis of variance with repeated measures and Bonferroni test (P < 0.05).Findings: The plasma level of atrogin-1 was not significantly different after exercise in both sessions (P > 0.05). The plasma level of insulin-like growth factor-1 significantly reduced after 90 and 180 minutes post-exercise in the sessions without milk consumption (P = 0.04 and 0.02, respectively); while milk consumption caused no significant change in this variable after exercise by prevention of reducing in insulin-like growth factor-1 levels (P > 0.05).Conclusion: It seems that consumption of low-fat milk, immediately after exercise in the fasting state, can help to maintain muscle mass by avoid reducing growth factors.

Keywords


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