Response and adaptation to exercises
javid nuri; saeid nikokheslat; mostafa khani; javad vakili
Abstract
Backgrounds: The aim of the present study is to determine the effect of eight weeks of high intensity interval training, resistance and combined training on hormonal factors and microRNAs related to obesity and sports adaptations in obese adolescent boys. Methods: 36 healthy, sedentary boys (age range: ...
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Backgrounds: The aim of the present study is to determine the effect of eight weeks of high intensity interval training, resistance and combined training on hormonal factors and microRNAs related to obesity and sports adaptations in obese adolescent boys. Methods: 36 healthy, sedentary boys (age range: 13-15 years; BMI: 28-31 Kg/m2; Fat Percent: 32-36%) were divided into four groups of intense, resistance and combined intermittent exercise and control (no activity) based on aerobic capacity and fat percentage. Each HIIT session consisted of 6-8 repetitions of 30-60 second sprints at 80-85% (three minutes rest between repetitions). Resistance training included movements of the main muscles of the upper body, trunk and lower body. Combined training consisted of a combination of resistance training and HIIT. The expression of miRNA-133a, miRNA-1 and miRNA-143 in obese and overweight adolescent boys was measured before and after the exercise training protocols. Results: The results of the present study showed that after completing all three training protocols, the expression levels of miRNA-133a, miRNA-1 and miRNA-143 decreased significantly compared to the pre-test stage. Also, only in the combined group, a significant difference was observed between the expression changes of miRNA-133a and miRNA-1 with the resistance training group, but the expression levels of miRNA-133a, miRNA-1 and miRNA-143 did not differ between the combined group and the HIIT group.Conclusion: Based on the results of the present study, it seems that using a combination of HIIT and resistance training is a suitable method to increase sports adaptations at the cellular level.
Exercise Physiology
Zohreh Shanazari; Mohammad Faramarzi; ZAHRA HEMATI FARSANI; Mohammad Soleimani
Abstract
Introduction: Body weight is adjusted through the balance between receiving food and energy. The ghrelin hormone increases appetite and food intake. The aim of this study was to examine the order effect of combined training on ghrelin levels and energy expenditure in overweight women. Methods: 30 overweight ...
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Introduction: Body weight is adjusted through the balance between receiving food and energy. The ghrelin hormone increases appetite and food intake. The aim of this study was to examine the order effect of combined training on ghrelin levels and energy expenditure in overweight women. Methods: 30 overweight female (aged 32-18 years, body mass index ≥ 25 kg m) was selected and randomly divided into three groups, endurance – resistance (E+S), resistance –endurance (S+E) and control group. Participants performed eight,weeks, threesessions per week combined training.. 24 h before and 48 h after training program Ghrelin levels and energy expenditure were measured by ELISA kit and Harris-Benedict formula. The statistical analysis was performed using ANOVA test and LSD post hoc test and SPSS statistical software with significance level of (P <0.05).Results: E+S and S+E intervention was caused increase on energy expenditure than control group (p<0.05) and There was no significant effect on ghrelin(p>0.05) . Also, there was no significant difference between strength - endurance and endurance-strength intervention on the ghrelin levels and energy expenditure in overweight women.Conclusion: Without attention to order of training, combined exercises has significant effect on and energy expenditure and There is no significant effect on ghrelin levels .it seems appropriate training methods for weight loss of overweight women.
