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.
Z Shanazari; M Faramarzi; E Banitalebi; R Hemmati
Abstract
Aim: One of the most important and prevalent disorders in elderly people is age-related muscular atrophy or Sarcopenia. Sarcopenia is associated with a significant reduction in muscle strength and volume. The purpose of this study was to investigate the effect of moderate and high intensity resistance ...
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Aim: One of the most important and prevalent disorders in elderly people is age-related muscular atrophy or Sarcopenia. Sarcopenia is associated with a significant reduction in muscle strength and volume. The purpose of this study was to investigate the effect of moderate and high intensity resistance training on serum levels of myostatin and IGF-1 in elderly rats Method: thirty male Wistar rats (23 months old) were randomly divided into two experimental and control group including moderate intensity resistance training (n = 10), high intensity resistance training (n = 10) and the control group (n = 10). Resistance training included 8 weeks of climbing a ladder with high intensity (80% MVCC) and moderate intensity (60% of MVCC) and 5 days a week. After completing training, serum concentration of IGF-1 and myostatin were measured using the ELISA method. Results: Myostatin concentration in decreased in high (916.5±43.1) and moderate (958.8±36.9) intensity resistance groups and IGF-1 increases in high (156.3±15.5) and moderate (141.8±7.4) intensity resistance groups (p<0.05). Also, there was significant difference between the IGF-I levels in high and moderate resistance training (p=0.009). However, there was no significant difference in myostatin level between groups. Conclusion: It seems that resistance training with moderate and high intensity can be change the resting levels of factors associated with muscular atrophy in elderly rats. However, there id further need to evaluate in human participants.
