Showing 16 results for Resistance Training
Abbas Saremi,
Volume 12, Issue 2 (9-2009)
Abstract
Background: Muscle mass is known to be a significant predictor of bone mineral density (BMD), and myostatin is a negative regulator of muscle growth. The aim of present study was investigate the effects of resistance training on bone mineral density and serum myostatin in healthy young men. Methods and Materials: In this clinical trial thirty young men were assigned to resistance training (n=15) and control (n=15) groups. The training group participated in 6 mounths of progressive whole-body resistance training. Total body fat, lean body mass, total body BMD, femoral neck BMD and L2-L4 spine BMD were determined by Dual-Energy X-ray Absorptiometry (DEXA) before and after 6 mounths of resistance training. Serum level myostatin measured by enzyme immnoassay. Results: Resistance training caused significant increases in chest press (52.36±6.36 vs 62.20±8.96 kg), leg press (135.24±13.77 vs 146.91±17.66 kg), lean body mass (61.00±0.96 vs 62.58±2.08 kg) and femoral neck BMD (1.115±0.078 vs 1.131±0.088 g/cm2), whereas myostatin were decreased (102.91±10.18 vs 94.03±13.93 ng/ml) (P<0.05). Total body BMD and L2-L4 spine BMD did not change with 6 months resistance training. Conclusion: A 6 month resistance training program increases muscle mass, power and improves BMD of the femoral neck in young men, and myostatin inhibition may play an important role in increasing BMD which is induced by resistance training.
Bahram Abedi, Mohammad Ali Azarbayjani, Maghsood Peeri, Mohammad Javad Rasaee,
Volume 14, Issue 5 (11-2011)
Abstract
Background: The effects of acute and chronic exercises on insulin resistance index may be related to one or more factors, including morphological changes and hormonal modifications. The purpose of this study was to investigate the effects of a single session of resistance training on adiponectin levels and insulin resistance until 24 hours post-exercise.
Materials and Methods: This experimental study, which followed a pretest-posttest design, was conducted on a group of 10 healthy male volunteers (23±1.4 years) with no history of participation in any regular exercise programs, weight changes more than 2 kg, special diseases, and smoking over the past 6 months that had normal body mass index (BMI) (23.7±1.6 kg.m-2). The subjects performed a single session resistance training (3 sets of 10 repetitions at 75% of 1 repetition maximum). Adiponectin, glucose, insulin, and insulin resistance index levels were measured before and 24 hours after the exercise.
Results: There were no significant differences for adiponectin (μ g.ml-1) pre- (6.98±1.9) and post-exercise (8.07±1.4) and glucose (mg.dl-1) pre- (81.3±7.6) and post-exercise (80.7±6.4). However, insulin resistance index pre- (1.34±0.27) and post-exercise (1.06±0.11) and insulin concentration (UΙμ.ml-1) pre-(6.64±0.88) and post-exercise (5.37±0.43) decreased significantly 24 hours post-exercise (P<0.05).
Conclusion: Based on the findings of this study, it can be suggested that a single session of resistance training with no significant changes in adiponectin level can have positive effects on glycemic indices in sedentary men.
Farzad Nazem, Khosrow Piri, Ali Hydrianpour, Amir Hosein Karimi,
Volume 17, Issue 10 (1-2015)
Abstract
Background: The aim of this study was to assess the effect of training, and noise stress on serotonin plasma level of Wistar rats.
Materials and Methods: For many years, physical activity have been used for the treatment of different neuropsychological dieases. Twenty one male witar rats (9-10 weeks old and 170.82±20.57g weight) were randomly divided into three groups: the noise group (n=7), training+noise group (n=7), and the control group (n=7). The aerobic training was performed 5 days per week, for a 60-day period. The noise stress included exposure to traffic noise 5 hrs/per day over a 60-day period (range:85-110 dB).The control group was not exposed to any noise or exercise, and was kept away from the sources of stress the rats were kept under the same conditions. At the end of the experiment, blood samples were collected and plasma serotonin concentrations were determined.For the statistical data analysis, one-way ANOVA and Tukey post-hoc tests were used (&alpha&le0.05).
Results: Plasma serotonin concentration significantly decreased in noise groups, in comparison with the controls (21.9±2.1, vs.40.8±7.3 &mumol/m, respectively p<0.000). The plasma serotonin levels in the noise +training groups (36.2±3.1) were apparently near to the controls However, resistance training could significantly increase plasma serotonin concentration in the noise+training group rats.
Conclusion: Increased serotonin level following resistance exercises might reduced stress in subjects.
Seyyed Reza Attarzadeh Hosseini, Morteza Motahari Rad , Navideh Moien Neia ,
Volume 19, Issue 7 (10-2016)
Abstract
Background: The aim of this study was to investigate the effect of resistance training with different intensities on serum myostatin and follistatin levels in sedentary young women.
Materials and Methods: In this practical and semi experimental study, 24 sedentary young women with range of 20-30 years and BMI 22-25 kg/m2 were selected by convenience sampling. Then, the volunteers were randomly assigned into two groups, [resistance training group with low intensity (40-60% of one repetition maximum) and high intensity (70-90% of one repetition maximum)]. The training protocols included: 8 weeks, 3 times a week. Blood samples (5cc) were obtained at baseline and 48 hours after at the end of the study; Also Serum levels of myostatin and follistatin were measured by ELISA methods. Data were analyzed using analysis of variance of repeated measures test by SPSS at the significant level (p<0.05).
Results: There was a significant increase in the levels of follistatin and follistatin to myostatin ratio in high intensity group (p≤0.05). Also there was a significant decrease in the levels of myostatin in high intensity group (p≤0.05); however, there was no significant change in the levels of follistatin, myostatin and follistatin to myostatin ratio in low intensity group (p≥0.05). Also there was no significant change in these variables in high intensity group compared to low intensity group (p≥0.05).
Conclusion: It’s seems that the activation of important myogenic and myostatic factors in sedentary young women need to do high intensity resistance training.
Mohammad Parastesh, Ali Heidarianpour, Mohammad Bayat, Abbas Saremi,
Volume 19, Issue 8 (11-2016)
Abstract
Abstract
Background: Diabetes mellitus is associated with reductions in fertility indices. Resistance training, on the other hand, through reducing the adverse effects of diabetes, exerts a positive impact on diabetic individuals. The aim of the present study was to examine the effects of ten weeks of resistance training on serum levels of reproductive hormones and sperm parameters in Wistar rats with diabetes mellitus type 2.
Materials and Methods: In this experimental study, 36 Wistar rats with mean weight of 200±50 were randomly assigned to healthy control, diabetic control and diabetic training groups. The diabetic resistance training group received ten weeks of resistance training (climbing up the ladder) following the induction of diabetes. Twenty-four hours after the last training session, left epididymis of the rats was examined for studying sperm parameters and blood serum samples were examined for evaluating reproductive hormones. Data were analyzed using one-way ANOVA and Turkey’s Post Hoc test at 0.05%.
Results: Ten weeks of resistance training induced significant increases in serum testosterone and FSH levels in the resistance training group in comparison to the diabetic group (p<0.007).Resistance training did not have any significant effects on serum LH levels in the resistance training group compared to the diabetic control group. In addition, sperm parameters (sperm count, survival rate and motility) presented significant improvements compared to the diabetic group(p<0.05).
Conclusion: Resistance training can improve sperm parameters, including sperm count, survival rate and motility, through increasing serum testosterone, LH and FSH levels (reproductive hormones) in rats with diabetes mellitus type 2.
Hamid Alizadeh, Alireza Safarzadeh, Elahe Talebi-Garakani,
Volume 20, Issue 7 (10-2017)
Abstract
Abstract
Background: Adipose tissue's phenotypic alteration due to exercise training is a new theory. However, the cellular–molecular mechanisms for these phenotypic alterations are not yet clearly
understood. The aim of this study was to investigate the effects of six weeks resistance training on Meteorin-like hormone level and insulin resistance index in overweight adolescent boys.
Materials and Methods: Twenty overweight adolescent boys (average age 18.5±1 years old, average weight 81.1±4.5 kg, and BMI 27.7±0.7 kg/m2) participated in this study. The subjects were randomly assigned into two groups: control (N=10) and resistance training (N=10). Subjects in training group performed six-week resistance training program 3 days/week. Anthropometrics parameters and fasting serum of Meteorin-like hormone levels, insulin and glucose were measured at the baseline and at the end of study.
Results: The level of Meteorin-like hormone was significantly decreased in control group (p=0.008), but that of Meteorin-like hormone in resistance training was increased insignificantly (p=0.311). The variations of Meteorin-like hormone levels between two groups were significant (p=0.004). The changes of insulin resistance were increased in both groups which were statistically significant (p=0.032) and insignificant (p=0.632) for control and training groups respectively. We found a negative and insignificant correlation between changes in Meteorin-like hormone levels and changes in insulin resistance index (p=0.273).
Conclusion: The results showed that six weeks’ resistance training has no effect on increasing Meteorin-like hormone serum level and improving insulin resistance index and body composition in overweight adolescent boys.
Amin Mombeyni, Mehdi Bahmanzade, Abbas Sarami, Saeed Changizi-Ashtiyani, Mohammad Parastesh,
Volume 21, Issue 4 (8-2018)
Abstract
Background and Aim: Following physical activity in various tissues of the body, oxidative stress occurs and affects the antioxidant capacity and consequently the fertility of men negatively. The aim of this study was to investigate the effects of resistance training on oxidative stress and spermatogenesis quality.
Materials and Methods: 20 male rats of Sprague Dawley (weight 200-250, 4 months old) were randomly divided into two groups of resistance training and control group (n = 10). The exercise program included climbing a ladder by hanging the load to the tail for 8 weeks (5 days a week, 3 times 4 repetitions). During the program, the load gradually was increased, and in the last week, it reached to 200% of the animal body weight. After intervention, the mice were anesthetized in separate groups and testicular tissue was isolated to evaluate Malondialdehyde index as an oxidative stress marker and to determine antioxidant capacity by Frap method. Fixation, processing, cutting of testicular tissue and eventually coloring steps were examined by Hematoxylin and Eosin (H & E). The spermatogenesisqualitywas calculated based on Johnson method. The data were analyzed by independent t-test was used and significance level was considered p <0.05.
Findings: Increased Malondialdehyde levels were observed in the treatment group compared to control group (p =0.01). In the training group, the spermatogenesis quality was lower (p =0.013), the antioxidant capacity in the training group was significantly higher than the control group (p=0.83) and there isn’t any significant difference.
Conclusion: The findings indicate thatdue to increased oxidative stress, increasing resistance training may have negative effects on the quality of spermatogenesis and men's fertility. |
Mohammad Parastesh, Zahra Nadi,
Volume 23, Issue 1 (3-2020)
Abstract
Background and Aim: The present study aimed to investigate the effect of a 10-week resistance training on the serum levels of insulin resistance index (HOMA-IR), the serum levels of liver enzymes, chemerin, and resistin in healthy and type 2 diabetic rats.
Methods & Materials: In this experimental study, 40 Wistar rats with the mean±SD weight of 200±48 gr were randomly divided into 4 groups (normal control, diabetic control, diabetic resistance training, and resistance training). The training groups performed regular resistance exercises for 10 weeks by ladders. Twenty-four hours after the last training session, the blood sample of rats was collected for resistin, chemerin, insulin, and liver enzymes. The obtained data were analyzed using one-way Analysis of Variance (ANOVA), Tukey posthoc test, Analysis of Covariance (ANCOVA), and Bonferroni posthoc test at a significance level of 0.05.
Ethical Considerations: This study was approved by the Research Ethics Committee of Arak University of Medical Sciences, Iran (Code: IR.ARAKMU.REC.1394.329).
Results: Diabetes induction significantly HOMA-IR, the serum levels of liver enzymes, resistin, and chemerin in the diabetic control group, compared to the healthy control group (P<0.05). Resistance training also significantly decreased insulin HOMA-IR, the serum levels of liver enzymes, resistin, and chemerin in the diabetic resistance training group, compared to the diabetic control group (P<0.05).
Conclusion: The obtained data suggested that resistance training improved liver enzymes in type 2 diabetic rats by decreasing the insulin HOMA-IR, the serum levels of chamirin, and resistin.
Ghasem Mohammadnezhad, Hassan Matin Homayi, Farshad Ghazalian,
Volume 23, Issue 1 (3-2020)
Abstract
Background and Aim: Tendon is the extracellular matrix of the muscle that mechanically and structurally adapts to the mechanical load. However, the cellular and molecular mechanisms of this adaptation are not known yet. The purpose of this study was to investigate the effect of 6 weeks of resistance training on expression of two Transforming Growth Factor Beta 1 (TGF-β1) and myostatin genes in the tendon of fast- and slow-twitch muscles including Extensor Digitorum Longus (EDL) and Soleus (SOL).
Methods & Materials: Twelve male Wistar rats with 8 weeks of age were randomly divided into two groups of exercise (n=6) and control (n=6). The exercise group performed resistance training (Carrying weights with 40-160% body weight on the ladder) for 6 weeks, 5 sessions per week. Forty-eight hours after the last training session, all rats were sacrificed and the tendons of SOL and EDL muscles were extracted. The mRNA expression level of TGF-β1 and myostatin genes was assayed using real time polymerase chain reaction. Independent t-test was used for statistical analysis.
Ethical Considerations: All experiments on animals were according to the ethical guidelines of Research Ethics Committee of Islamic Azad University, Central Tehran Branch (ethical code: IR.IAU.PS.REC.1398.296)
Results: The expression of TGF-β1 gene in EDL (P≤0.001) and SOL (P≤0.01) muscle tendons significantly increased, while the expression of myostatin gene in EDL (P≤0.001) and SOL (P≤0.05) tendons were significantly reduced.
Conclusion: Resistance training appears to up-regulate the basal levels of TGF-β1 gene and down-regulate the basal levels of myostatin gene in tendons of fast- and slow-twitch muscles, where these effects are significantly more pronounced in the tendon of fast-twitch muscle.
Azar Hamidi, Amir Rashidlamir, Rambod Khajei, Mehdi Zarei, Ahmad Zendedel,
Volume 23, Issue 3 (8-2020)
Abstract
Background and Aim: Coronary Heart Disease (CAD) is one of the most important causes of mortality. Exercise activities after coronary artery bypass surgery increase the density of myocardial capillaries called angiogenesis and improve cardiovascular function. The aim of the present study was to determine the effect of aerobic-resistance training on plasma basic fibroblast grown factor levels in post-coronary artery bypass grafting patients.
Methods & Materials: The sample consisted of 30 men aged 45-60 years who underwent bypass surgery. They were randomly divided into experimental (n=15) and control (n=15) groups. The experimental group performed aerobic resistance training for eight weeks (3 sessions per week) and the control group did not. Blood samples were taken 24 hours before the start of the first training session and 48 hours after the last training session while all subjects were fasting. In vitro ELISA method was used to measure BFGF. Independent and paired t-test and Shapiro-Wilk test were used to analyze the data at the significant level of 0.05 in SPSS v. 21.
Ethical Considerations: This study was registered (Ethics Code: IR.IAU.NEYSHABUR.REC.1398.01) in the Ethics Committee of Islamic Azad University, Neishabour Branch, and with Clinical Trial Code: IRCTID:IRCT20191228045919N1.
Results: Eight weeks of aerobic-resistance training significantly increased bFGF levels in the exercise group compared to the control group (P=0.002). Also, pre and post changes in the experimental group showed a significant increase in plasma bFGF levels (P=0.002), which was not significant in the control group (P=0.758).
Conclusion: According to the results, it may be concluded that combined (aerobic resistance) exercise may increase angiogenesis and capillary density in post-CABG patients by increasing plasma bFGF levels
Seyed Hadi Seyedi, Rambod Khajei, Amir Rashid Lamir, Mohammad Reza Ramazan Poor, Jamshid Mehrzad,
Volume 23, Issue 4 (9-2020)
Abstract
Background and Aim: Coronary Artery Disease (CAD) is one of the leading causes of death and mortality in today's societies. Physical activity increases some of the influential factors for this disease. The purpose of this study was to investigate the effect of 8 weeks of aerobic and resistance training on endostatin in patients with Coronary Artery Bypass Graft (CABG).
Methods & Materials: The study participants were 24 male patients who were randomly divided into the experimental (n=12) and control (n=12) groups with Mean±SD age of 55.37±6.90 years, weight 75.45±5.87 kg, height 173.27±3.36 cm and body mass index of 25.11±1.55 kg/m2. The experimental group performed 8 weeks of aerobic and resistance training (3 sessions per week and 1.5 hours per session) based on the measurements, while the control group did not exercise during this period. To measure endostatin concentrations, blood samples were taken 48 hours before and 48 hours after the last training session while all subjects were fasting. Data were analyzed using the Shapiro-Wilk test to normalize the data and Student t-test in independent and correlated groups at the significant level of 0.05.
Ethical Considerations: This article was ethically approved by Azad University of Neyshabur (Ethics Code IR.IAU.NEYSHABUR.REC.1398.018) and with the Clinical Trial Code IRCT20191228045916N1 in the Iranian Registry of Clinical Trials.
Results: The present study showed that the aerobic and resistance training group significantly decreased endostatin concentrations (P=0.001) (t=1.672) compared with the control group.
Conclusion: Based on the findings, aerobic and resistance training decreases endostatin concentrations, known as an anti-angiogenic factor.
Vahid Fekri Kourabbaslou, Ali Fakourian, Mohsen Heydarian, Seyed Masoud Kashfi,
Volume 24, Issue 5 (11-2021)
Abstract
Background and Aim: Resistance training with blood flow restriction can have the same effects as traditional resistance training. The current study aimed to determine the effect of six weeks of selected resistance training with active and passive rest, with and without blood flow restriction, on young men’s C Reactive Protein (CRP), Lactate Dehydrogenase (LDH), and muscle endurance.
Methods & Materials: From the available and voluntary samples, 24 healthy young soldiers of the Islamic Republic of Iran Air Force were divided into 3 groups of 8 subjects: traditional resistance training, resistance training with blood flow restriction, and passive rest and resistance training with blood flow restriction and active rest. Exercise programs were performed for 6 weeks, 3 sessions per week with an intensity of 70-80% One-repetition maximum (1RM) for the traditional resistance group (3 sets of 10), 20-30% 1RM for the passive rest group (30-15-15-15), and 20 -30% 1RM was administered for the active rest group (30-7-15-7-15). Before and after six weeks, physiological and anthropometric characteristics, muscle endurance, and hormonal levels were measured, and ELISA measured blood samples. Data were analyzed using covariance and Bonferroni post hoc tests and paired t-test for comparison within groups.
Ethical Considerations: All experimental procedures were approved by the Ethics committee of the Sport Sciences Research Institute of Iran (Code: I.R.SSRC.REC.1398.129), Clinical Trial (Code: ID IRCT20191207045644N1) from the Iran Clinical Trial Registration Center and were conducted under the Declaration of Helsinki.
Results: Results showed that 6 weeks of exercise had a significant effect on Muscle endurance (P=0.001) but on the levels of C-reactive protein (P=0.43) and Lactate dehydrogenase (P=0.44) had no significant difference.
Conclusion: According to the results of this study, it seems that a combination of resistance training with restriction of blood flow and Interval training (active rest) can be a good alternative to traditional training and, in some cases, replace resistance training with occlusion and passive rest.
Neda Kafi, Amene Barjaste Yazdi, Rambod Khajei, Mohammadreza Hoseinabadi,
Volume 26, Issue 2 (7-2023)
Abstract
Introduction: The purpose of this research was to investigate the effect of a period of resistance training and melatonin consumption on sex hormone levels, pain intensity, and sleep quality in girls with primary dysmenorrhea.
Methods: For this purpose, 60 girls with moderate primary dysmenorrhea disorder (score 4-7) were randomly placed in 4 groups: resistance training + melatonin, resistance training + placebo, melatonin supplement group, and control group. Pain intensity, and sleep quality were assessed by the McGill questionnaire, and the Pittsburgh questionnaire respectively. 10 mg of melatonin was taken daily in two 5 mg capsules and the placebo group received the same amount of carbohydrates in the same capsule. Weight training, three days a week for eight weeks. This circuit exercise training was in 9 stations and with a maximum of 10-12 repetitions at 30-65% of a maximum repetition in each station. Each set and repetition was separated by 2-3 minutes and 90 seconds of rest, respectively. The blood sample was taken in the morning, fasting and 5 cc from the brachial vein from the left hand while sitting in the sitting position, and was taken by special kits. Data were analyzed by ANOVA with repeated measures and Bonferroni post hoc test at level P<0.05. All experimental procedures were approved by the Ethics committee of the Sport Sciences Research Institute of Iran (Code: ID IR.IAU.NEYSHABUR.REC.1401.008), Clinical Trial (Code: ID IRCT20230703058653N1) from the Iran Clinical Registration Center and were conducted under the Declaration of Helsinki.
Results: A significant increase in Estrogen (P<0.001) and progesterone (P<0.001) levels in the exercise + supplement group compared to all groups, and in the exercise + placebo group and the supplement group compared to the placebo group was reported. Also, The decrease in Pain intensity (P<0.001) and sleep quality (A decrease in the sleep score means an increase in the sleep quality in the output of the questionnaire) (P<0.001) in the supplement group compared to all groups and in the exercise + placebo group (P<0.05) and the exercise + supplement group compared to the placebo group showed a significant difference.
Conclusions: It seems that synergy of exercise and melatonin has affected the sex hormones level. Also, the melatonin probably helped to improve the sleep quality and pain intensity of the subjects through the adjustment of sex hormones following dysmenorrhea. Also, exercise probably has an effect on the pain intensity and sleep quality through the release of beta-endorphins and the effects of exercise on the menstrual cycle, although the finding are ambiguous.
Zahra Yousefvand, Masoud Rahmati, Rahim Mirnasuri,
Volume 27, Issue 3 (7-2024)
Abstract
Introduction: Considering the synthesis and release of myokines from muscle tissue during exercise and the relationship of myokines with the development of strength and increase in muscle volume, the purpose of this study is to investigate 12 weeks of resistance training on the serum levels of myonectin and FGF- There were 21 middle-aged men.
Methods: In a semi-experimental study, 40 middle-aged men of Arak city (mean age 38.27 ± 6.02 years, weight 77.12 ± 11.23 kg, height 174.05 ± 7.22 cm) were selected and randomly placed in two resistance training groups (20 people) and control (20 people). The training group performed 12 weeks of resistance training 3 times a week with an intensity of 65-80% of maximum strength. Blood was taken from all the subjects 48 hours before and after the intervention, and serum levels of myonectin and FGF-21 were checked by the ELISA method. After checking the normality of the data, they were analyzed by the correlation t-test and independent t-test at a significance level of less than 0.05.
Results: Resistance training caused a significant increase in the serum level of myonectin (P = 0.001) and the serum level of FGF-21 (P = 0.001) and also decreased the percentage of fat (P = 0.417) in middle-aged men.
Conclusions: According to the results of this study, it seems that resistance training can have positive adaptation by increasing the serum levels of myonectin and FGF-21 in the regulation of muscle mass, hypertrophy process, angiogenesis process, and Improve the body's metabolism.
Pariyan Azad Derakht, Mohammad Fathi, Dr Raziyeh Rezaei, Raziyeh Rezaei,
Volume 27, Issue 5 (12-2024)
Abstract
Introduction: Physical activity positively influences various physiological factors, laying the groundwork for beneficial changes. Myostatin and follistatin are among these factors, whose levels are influenced by gender and physical activity. The present study was conducted with the aim of investigating the effect of traditional resistance training (RT) and high functional training (HIFT) on the serum levels of myostatin and follistatin in young women.
Methods: In this semi-experimental study, 30 young women were selected and divided into three groups: intense functional training, traditional resistance training, and control. Blood was drawn 24 hours before and 48 hours after the end of the interventions to measure the serum levels of myostatin and follistatin. The exercise protocols were performed for eight weeks, 3 days a week and 60 minutes a day. Ultimately, the collected data were analyzed using the ANOVA statistical method, with a significance level set at P < 0.05.
Results: The results showed that follistatin level was significantly higher in the RT and HIFT groups than in the control group (P = 0.001). Also, the amount of follistatin in the HIFT group was considerably higher than the RT group (P = 0.01). The results showed that the level of myostatin in the RT and HIFT groups was significantly lower than the control group (P = 0.001). Also, the amount of this factor in the HIFT group was substantially lower than in the RT group (P = 0.01).
Conclusions: In general, the findings of the present study show that performing intense resistance and functional exercises causes a favorable change in the expression of physiological factors related to muscle growth in women. It seems that the effect of intense functional exercises is greater than resistance exercises.
Hamid Moghavemi, Sadegh Abbasian, Mohammad Ali Sardar,
Volume 27, Issue 5 (12-2024)
Abstract
Introduction: Reducing physical activity as well as consuming more calories than the body needs increases obesity and its related disorders, such as metabolic syndrome. Therefore, this study aimed to determine the effect of eight weeks of high-intensity interval training (HIIT) and resistance training (RT) on brain tissue gene expression of AKT2 and insulin resistance in obese Wistar rats.
Methods: 30 male rats weighing 160 to 185 grams were fed a high-fat diet for 12 weeks. After the approval of the obesity protocol of increasing the weight of the rats, which to be more than 300 grams, the rats were divided into three groups, including the control group (n = 10), HIIT group (n = 10), as well as RT group (n = 10). Until the end, the rats continued to eat a high-fat diet. HIIT was performed for eight weeks and five sessions per week, with an intensity of 80 to 95% of maximum oxygen consumption on a treadmill. Moreover, RT was performed with an intensity of 40-60% of a maximum repetition on the ladder. After eight weeks of training interventions, the expression level of the AKT2 gene in brain tissue was measured by the real-time PCR method.
Results: The results of the present study demonstrated a significant increase in AKT2 gene expression of HIIT and RT groups compared to the control group (P < 0.05). Furthermore, the results illustrated that the insulin resistance of rats in both training groups was significantly reduced (P < 0.05).
Conclusions: According to the findings of the present research, it could be concluded that HIIT, as well as RT interventions, probably causes an increase in AKT2 gene expression and could be effective in reducing insulin resistance and improving glucose profile.
