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Background: Mir-210 is proangiogenic microRNAis endothelial cells. This microRNA, causes the repression of some genes and proteins target so cause angiogenesis process. The purpose of this study was to determine the effect of a High Intensity Interval Training (HIIT) on Mir-210 and EphrinA3 receptor genes expression in soleus muscles of male rats.

Materials and Methods: In this experimental study, Twelve Wistar male rats(ageof eightweeks, average weight of 210.5±9.77)were randomly divided into exercise(n=6)and control (n=6) groups. High Intensity Interval Training was formed five days a week for eight weeks to taly including three Intervals (four minutes with an intensityof 90 to 100%VO2max and two minutes with an intensityof 50 to 60%VO2max).24 hours after exercise protocol, the rats were dissected and separated soleusmuscle. Mir-210 and EphrinA3receptor genes expression was performed by Real Time-PCRtechnique. Mir-210 and EphrinA3receptor genes expression were calculated by using the2∆∆CT and in dependentt-test to determine the significance of variables.

Results: Results showed that HIIT there had no significant effects on Mir-210 gene expression (p=0.16) Whe ars EphrinA3 gene expression in the exercise group was statistically significant (p=0.000).

Conclusion: It seems that a non-significant increase of Mir-210 and reduce in EphrinA3 gene expres sion, causes proangiogenic Operation ofendothelial cells and an increase in VO2max of rats following eight weeks of HIIT performance can be due to increased angiogenesis process.

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Background: Irisin is an exercise-induced myokine that is reduced with type 2 diabetes and improves insulin resistance via the browning of white adipose tissues. However, irisin response to two types of exercise in patients with type 2 diabetes is unknown.

Materials and Methods: In this study, 22 diabetic Wistar rats (Induced by high-fat diet and injections Stz) were randomly assigned to 3 groups: high intensity interval exercise (HIIT), low intensity continuous training (LICT) and control (C). Both HIIT and LICT groups trained on the treadmill 5 sessions per week for 8 weeks. Blood samples were taken 24 hours after the last training session and plasma irisin, insulin and glucose levels were measured. ANOVA and Tukey post hoc tests were used to analyze data and the level of significance has been considered at p≤0.05.

Results: Data analysis showed that plasma irisin levels in the HIIT group were significantly increased compared to the control group (p<0.05). However, there was no significant difference between other groups (p>0.05). Plasma glucose in both HIIT and LICT groups was significantly decreased compared to the control group (p<0.05). But plasma insulin levels and insulin resistance index were not different between groups (p>0.05).

Conclusion: The results of this study showed that exercise training can increase plasma irisin in rats with type 2 diabetes. However, these changes are partially dependent on the type of exercise training.

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Background: High intensity training can lead to lower the appetite. So, the purpose of this study was to investigate the effect of folate supplementation on ghrelin level of stomach and insulin level of serum in male wistar rats during 10 weeks of high intensity interval training (HIIT).

Materials and Methods: Twenty seven male Wistar rats (weight= 203.94±27.34 gr, Age: 9 weeks) after one week familiarization, were randomly divided into four groups: control (n=6), folate supplementation (n=6), (HIIT) (n=7) and HIIT+ folate supplement (n=8). HIIT training protocol started with 30 m/min running on treadmill for 1 min with 10 reps and 2 min active rest at the first week and reached to 75-80 m/min for 1 min with 7 reps and 3 min active rest at last 3 weeks. Acylated ghrelin level of stomach tissue and serum level of insulin were assayed by ELISA kit.

Results: The results of Kruskal-vallis analysis showed that the ghrelin level of stomach was increased significantly (p=0.001) in folate+HIIT in compare with HIIT group. Also, insulin level of serum was decreased significantly (p=0.001) in folate +HIIT in compare with control and HIIT groups.

Conclusion: Based on our results, folate supplementation during high intensity interval training, increased the ghrelin of stomach and decreased the insulin level of serum. So, it seems that folate supplementation can prevent from losing appetite in athletes who train with high intensity training with interval type.

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Abstract

Background: The prevalence of obesity among children is alarmingly rising. Obesity in a chronical inflammatory condition accompanies with inflammatory markers such as Chemerin and CRP; therefore, the aim of this following study is to compare the affection of Endurance & High Intensity Interval Trainings on levels of Chemerin & Protein of C-reactive plasma in obese children.

Materials and Methods: This experimentation included 21 obese children (average weight 61.46±2.5 kg and BMI 7.1±4.31) aging 9-12 years old who were randomly divided into three groups of endurance, HIIT and control (n=7). The training groups performed regular exercises for 8 weeks long (3 sessions in every week). The differences between groups were evaluated using covariance analysis. (p<0.05).

Results: In both training groups, there was a more significant decrease in weight, BMI and body fat percentage than there was before workouts. In HIIT group, we witnessed a significant reduction in level of Chemerin (p=0.016) than before. CRP level was also decreased in both groups, but the changes were not significant.

Conclusion: In summary, 8 weeks of HIIT exercises compared to endurance trainings have greater effect on Chemerin and CRP levels in obese children.

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Background and Aim: The aim of study was to investigate the effect of 8 weeks of moderate-intensity continuous training (MICT) and high intensity interval training (HIIT) on the GLUT4 gene expression in skeletal muscle of obese male rats. Materials and Methods: Twenty-eight male Wistar rats with 150 ± 25 grams body weight were divided into base control (n = 6), obese control (n = 6), MICT (n = 8), and (n = 8) HIIT groups as study sample. At the beginning of the study, base control group rats were sacrificed. In other groups, rats underwent high fat regime diet for 8 weeks. After one week of familiarization, rats in training groups run on treadmill for 8 weeks and 5 days per week. Forty-eight hours after the last session, the rats were scarified and gastrocnemius muscle tissue sample were removed. GLUT4 gene expression was measured by Real-Time PCR methods. Findings: Results indicated that high fat diet for 8 weeks significantly increased rats body weight (p= 0.001), whereas both of MICT and HIIT training significantly decreased body weight (p= 0.001). Moreover, the MICT and HIIT had significant increase in GLUT4 gene expression in gastrocnemius muscle of obese rats (p = 0.001). Although, there were no differences between two experimental groups (p = 0.99). Conclusion: According to the results, the MICT and HIIT increase gene expression of GLUT4 in mixed muscle fibers in obese rats.

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Background and Aim Apoptosis or programmed death is active biological process and reversible that the balance between growth and cell death in various tissues, particularly myocardial tissue is essential role. The aim of this study was the effect of 8 weeks High Intensity Interval Training (HIIT) with and without food restriction on gene expression of Caspase 3 and 9 in rats.
Methods & Materials: This study was experimental multi group design with control group which conducted on 30 rats with two months old male. Subjects were divided in to five homogenous groups including base control, control, caloric restriction, interval exercise training and caloric restriction+interval exercise training. Training groups five sessions in weeks were participated in interval exercise training for 8 weeks. The level of gene expression of the proteins Caspase 3 and 9 was evaluated by Real Time-PCR. Dates were analyzed using the 1-way ANOVA at the level of (P<0.05).
Ethical Considerations: The protocol of this study was approved by the Medical Committee of Sanandaj University of Medical Sciences (Code: IR.MYK.REC.1397.5022).
Results: The results showed that the training group had a significant decrease in gene expression of Caspase 3 in comparison with caloric restriction+exercise training (P<0.05). Also, exercise training and exercise training+caloric restriction significantly decrease in the gene expression of Caspase 9 compared to caloric restriction, base control and control (P<0.05) and significantly decrease in the gene expression of Caspase 3 compared to base control and control (P<0.05).
Conclusion: According to the results, it seems that high intensity interval training with and without calorie restriction provides the necessary adaptations to inhibit or stop apoptosis induced by aerobic exercise. 

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Introduction: Non-alcoholic fatty liver disease (NAFLD) is the most common liver disorder in industrialized societies. As an appetite inhibitory and energy balance regulator, nesfatin-1 plays a substantial role in the pathogenesis of obesity-related abnormalities. This study was conducted to determine the effects of 12 weeks of combined training (resistance training and high-intensity interval training (HIIT)) on the serum levels of nesfatin-1 and some liver enzymes in men with NAFLD.
Methods: In this semi-experimental study, 20 middle-aged men with NAFLD were randomly divided into two exercise and control groups. The exercise program included 12 weeks of combined training, featuring two sessions per week of resistance training and one session of HIIT. Body weight, body mass index (BMI), nesfatin-1 peptide, liver enzymes (ALT, AST, and ALP), lipid profile, maximal oxygen consumption (VO₂max), and body fat percentage at the beginning and after 12-weeks were evaluated. Independent and dependent t-tests were analyzed to assess intra-group and inter-group differences, and the significance level was
P < 0.05.
Results: 12 weeks of combined resistance training and HIIT increased nesfatin-1 and decreased liver enzymes ALT, AST, and ALP in the exercise group compared to the control group and the pre-training stage (P < 0.05). We also observed an increase in VO₂ max and a decrease in body weight, BMI, body fat percentage, and LDL in the exercise group compared to before starting the training protocol (P < 0.05).
Conclusions: Based on the results of the present study, it can be concluded that performing combined exercise training for twelve weeks led to an increase in nesfatin-1 peptide levels and a decrease in liver enzymes. It was suggested that this could be a cost-effective therapeutic approach recommended for patients with NAFLD.