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.
Karim Azali Alamdari; Y yavari; R Hosseinzadeh; A Rahbar Ghazi
Abstract
Aim: In this study the effects of a single training session of overweight men before and after a meal on serum acetylated ghrelin levels, daily energy intake and the exercise energy expenditure were compared.
Method: In this semi experimental study, 30 overweight men (Mean and SD age of 25.2±3.54 ...
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Aim: In this study the effects of a single training session of overweight men before and after a meal on serum acetylated ghrelin levels, daily energy intake and the exercise energy expenditure were compared.
Method: In this semi experimental study, 30 overweight men (Mean and SD age of 25.2±3.54 years, BMI 27.96±3.64 kg/m2, weight 83.2±5.8 kg) were randomized into three groups (n = 10) including before lunch training, post lunch training and control. Experimental groups performed eight weeks, three sessions/wk of aerobic training sessions, consisted of 25 to 40 min of treadmill running and/or cycling at maximal fat oxidation intensity, either an hour prior to or two hours after a meal. Exercise energy expenditure, daily caloric intake and fasting serum acylated ghrelin levels in response to a single exercise session were measured as data in both pre and post-test occasions.
Results: A single training session either pre or post lunch meal increases serum acylated ghrelin level (P≤ 0/001), exercise energy expenditure (P≤ 0/001) and daily caloric intake (P≤ 0/001); indicating a compensatory energy intake which lowers the expected exercise-induced weight loss.
However, pre meal exercise leads to more remarkable increases in exercise energy cost (P≤ 0/001) concomitant with an elevated fasting serum acylated ghrelin levels (P≤ 0/001).
Conclusion: If appetite suppression is the only goal for exercise, it seems that exercise training should be performed after meals, and if maximizing each session’s energy cost is the case, it is better to practice before meals.
