Minoo Bassami; Banipal Tataroo; Sajad Ahmadizad
Abstract
Purpose: The present study was designed to investigate the effects of L-Arginine supplementation on fat and carbohydrate metabolism during high intensity interval exercise (HIIE) in overweight individuals. Methods: Ten male overweight students performed two HIIE trials including 10 intervals of 3 min ...
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Purpose: The present study was designed to investigate the effects of L-Arginine supplementation on fat and carbohydrate metabolism during high intensity interval exercise (HIIE) in overweight individuals. Methods: Ten male overweight students performed two HIIE trials including 10 intervals of 3 min encompassed 1 min running at 100% of vVO2max and 2 min active recovery at 40% of vVO2max. In each session subjects consumed either supplement or placebo 90 min prior to exercise. Before and after supplementation and immediately after exercise glucose, insulin, non-esterified free fatty acid (NEFA) and triglyceride were measured. Oxygen consumption and exhaled carbon dioxide were collected to calculate fat and carbohydrate oxidation. Results: There were no significant differences between two trials for glucose, insulin, NEFA, triglyceride and fat oxidation (P>0.05). However, carbohydrate oxidation rate was significantly different between two sessions (p < 0.05). In addition, glucose and carbohydrate oxidation were significantly increased following HIIE irrespective of L-Arginine supplementation (p < 0.05). Conclusions: Based on the findings of present study it could be concluded that L-Arginine supplementation leads to increases in carbohydrate oxidation during HIIE in overweight men, but has no effect on resting at metabolism.
A Khodamoradi; E Talebi Garakani; F Mir Mohammad Rezaei; R Fathi
Abstract
Aim: Excessed energy is stored as triacylglycerol (TAG) in adipose tissue within various organs. In order to reduce excessed fat storage, the utilization of fat storage must be increased to produce energy. The purpose of this study was to evaluate the effects of 8 weeks progressive resistance training ...
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Aim: Excessed energy is stored as triacylglycerol (TAG) in adipose tissue within various organs. In order to reduce excessed fat storage, the utilization of fat storage must be increased to produce energy. The purpose of this study was to evaluate the effects of 8 weeks progressive resistance training on expression of proteins involved in skeletal muscle tissue lipolysis in rats feed with sucrose solution. Method: 32 male Wistar rats (6-8 weeks) were randomly divided into two groups, the first group took sucrose solution 30%, the second group did not. After 4 weeks, each group divided into exercise and control groups. Exercise groups performed a progressive resistance training protocol 3 days per week for 8 weeks. Tissue samples were taken 2 days after the last session. HSL, Perilipin and LXRα protein expression were determined by Western blot. To evaluate the difference between the variable and the interaction between them, two-way ANOVA at the significant level of P˂0.05 was used. Results: Protein levels of HSL and Perilipin were increased in the exercise group compared to control (P˂0.001), but LXRα levels were unchanged. The effect of sucrose solution alone and the interaction between the consumption of sucrose and progressive resistance training on the expression of these proteins in muscle tissue were not significant. Conclusion: The results show that although the 8 weeks of progressive resistance training significantly increased the expression of some proteins involved in lipolysis, but these changes are not related to the consumption of sucrose solution.
