Exercise Physiology
ADEL DONYAEI; Abolfazl Khosravi; Masoud Ardeshiri; farhad gholami
Abstract
Objectives: exercise training has a remarkable metabolic and appetite-regulating effects. Appetite-regulating effects of exercise training may be altered by fasted and fed status. Methodology: in a randomized trial, 54 obese men with BMI > 30 kg/m2 were randomly divided into groups including 2 experimental ...
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Objectives: exercise training has a remarkable metabolic and appetite-regulating effects. Appetite-regulating effects of exercise training may be altered by fasted and fed status. Methodology: in a randomized trial, 54 obese men with BMI > 30 kg/m2 were randomly divided into groups including 2 experimental groups of training (fasted and fed) and control. The experimental groups performed a concurrent exercise program including aerobic training (walking/ running at 60-70% of heart rate reserve lasting 30 minutes) followed by strength training (circuit training with 10 repetitions for each exercise in 3 rounds interspersed with 2-3 min rest) with a frequency of 3 d/w over 8 weeks. The fasted group performed exercise program following overnight fasting, and the fed group performed the exercise program following breakfast. At the beginning and 48 hours after the last training session measurements were performed. Data were analyzed using one-way analysis of variance at a significance level of 0.05. Results: concurrent training resulted in a significant decrease in leptin (p=0.001) as well as the appetite (p=0.002) compared to the control group; yet, no significant difference was observed between the two experimental groups (P<0.05). Furthermore, ghrelin significantly decreased in the experimental groups compared to the control (p=0.001) and a significant difference between the two experimental groups was also observed (p=0.013). Conclusion: The findings of the present study indicates that appetite and leptin are remarkably affect by concurrent training but not by pre-exercise feeding status. However, ghrelin resting concentration is likely to be affect by pre-exercise feeding status (fasted vs fed).
Hanie Berahman; alireza Elmiyeh; Mohammad Reza Fadaei
Abstract
Aim: It seems that exercise training may have benefits for improving metabolic syndrome and obesity. However, there are limited documents in effect of water-based rhythmic exercise training and the menopause population. Therefore, the aim of this study was to determine the effect of water-based rhythmic ...
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Aim: It seems that exercise training may have benefits for improving metabolic syndrome and obesity. However, there are limited documents in effect of water-based rhythmic exercise training and the menopause population. Therefore, the aim of this study was to determine the effect of water-based rhythmic exercise training on leptin, aldosterone and blood pressure in obese postmenopausal women with metabolic syndrome.Method: This study was a clinical trial performed on 31 obese and postmenopausal women aged 65-75 years with metabolic syndrome (15 in the control group and 16 in the experimental group). The participants were randomly allocated into control and experimental groups. The experimental group performed that water-based rhythmic exercise training for 12 weeks, three sessions per week and 60 minutes per session. Leptin, aldosterone and blood pressure were measured before and after the end of the intervention period in both groups. Data were analyzed using independent t – test and Covariance by SPSS software version 16.Results: Twelve weeks water-based rhythmic exercise training significantly reduced leptin (P = 0.001), aldosterone (P = 0.001), systolic blood pressure (P = 0.001) and diastolic blood pressure (P = 0.031) in obese postmenopausal women with metabolic syndrome.Conclusion: It seems that water-based rhythmic exercise training have a positive effect on leptin, aldosterone and blood pressure on Obese postmenopausal women with metabolic syndrome.Keywords: leptin, aldosterone, blood pressure and water-based rhythmic exercise training.
A Abasspour Mojdehi; R Shabani; MR Fadaei chafy
Abstract
Aim: High intensitystrength and endurance training can increase exercise capacity. The aim of this study was to describe the effect of high intensity strength and endurance training on body fat index, glucose homeostasis and serum leptin of 15 to 20 year old Taekwondo players boy. Method: Of the eligible ...
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Aim: High intensitystrength and endurance training can increase exercise capacity. The aim of this study was to describe the effect of high intensity strength and endurance training on body fat index, glucose homeostasis and serum leptin of 15 to 20 year old Taekwondo players boy. Method: Of the eligible volunteers in the study, 20 taekwondo players aged 15 to 20 were selected as the research sample. The subjects were randomly divided into two groups: moderate-intensity resistance-endurance training (the first group, the mean age was 17.77 ± 2.26 years) and high intensity (second group, 16.90 ± 1.72 years). The first group, , had moderate intensity and endurance training for 95 minutes, and the second group performed high intensity training for 80 minutes. Along with the conventional taekwondo exercises Before and after 8 weeks training, body fat index, glucose hemeostasis and serum leptin were assessed. For data analysis, dependent t-test and independent t- test were used. p < strong>Results: Compared with the pre-test, in the second group a significant decrease was observed in the body fat percentage, insulin and insulin resistance levels. Leptin and FBS significantly decreased after exercise in both groups. The Comparison between groups showed only significant difference in body fat percentage (P=0.03).. Conclusion: High intensity strength and endurance training in athletes can potentially lead to significant reduction in subcutaneous fat. Decreased serum leptin and glucose levels and improved insulin sensitivity can improve the taekwondo lpayers performance
Mohammad Reza Fadaei chafy; Farhad Rahmani-Nia; Hamid Mohebbi; Saed Mohsen Maddah
Volume 4, Issue 1 , May 2014, , Pages 1-14
Abstract
Aim: The purpose of this study was to investigate the effects of aerobic exercise on leptin and testosterone in obese boys’ serum at different pubertal stages. Method: The cross-sectional study had a pre-test- post-test design. The subjects included 36 obese boys aged 12 to 17 years, who according ...
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Aim: The purpose of this study was to investigate the effects of aerobic exercise on leptin and testosterone in obese boys’ serum at different pubertal stages. Method: The cross-sectional study had a pre-test- post-test design. The subjects included 36 obese boys aged 12 to 17 years, who according to the Tanner index, were in the stage of puberty of TS2 to TS5. The subjects were divided in to two groups, TS2, 3 (n=19, age: 13.4±0.94 years, Weight: 76.61±16.7 kg, BMI: 29.41±5.22 kg/m2) and TS4, 5 (n=17, age: 14.9±1.48 years, Weight: 93.57±16.48 kg, BMI: 30.92±3.88 kg/m2), each divided into aerobic exercise and control groups. After anthropometric measurements, fasting serum’s leptin and testosterone levels were measured. The aerobic exercise group completed 12 weeks of running, three times a week 30 minutes on average with an intensity of 60 to 85 percent of maximum heart rate. A pedometer was used to measure the level of physical activity and N4 software was used for measurement of energy intake. The statistical t-test, one-way and two-way ANOVA was used to analyze the data. Results: Lean body mass increased and body fat percent decreased significantly in aerobic exercise group at both stages of puberty (P≤0.05). In aerobic exercise group decrease in BMI and body fat, was only significant in TS4, 5 (P≤0.05). serum leptin levels decreased at different stages of puberty and was at only significant in aerobic exercise group (P≤0.05); but its changes in aerobic exercise and control groups at each stage of puberty wasn’t significant. Analysis of variance showed that puberty affects leptin changes (P≤0.05) but there was no significant difference between the effect of aerobic exercise on leptin decrease and changes in testosterone in both groups (TS4, 5 and TS2, 3 ) Conclusion: The results indicated that aerobic exercise in obese adolescent boys can lead to favorable changes in body composition, along with decreased serum’s leptin. However, part of these changes result from the normal maturation process that can lead to different responses to aerobic training, though due to the low number of subjects showing it about serum’s leptin, was not possible.
Payman Salimi; Dariyosh Sheikholeslami Vatani
Volume 2, Issue 2 , July 2012, , Pages 165-176
Abstract
Abstract
Aim: The aim of present study was to examine the influence of acute resistance exercise orders on response serum leptin and testosterone in overweight young men.
Method: Fourteen young men (mean age: 21.36±1.25 years and BMI: 27.95±1.88 kg/m2) were selected randomly and completed two sessions ...
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Abstract
Aim: The aim of present study was to examine the influence of acute resistance exercise orders on response serum leptin and testosterone in overweight young men.
Method: Fourteen young men (mean age: 21.36±1.25 years and BMI: 27.95±1.88 kg/m2) were selected randomly and completed two sessions of resistance exercise.The Exercise protocol consisted of two different protocols ]protocol A: from large to small muscles (Leg press, bench press, Lat Pull-down, overhead press, biceps curl, triceps extension (and Protocol B: from small to large muscles (Reverse Sequence of protocol B [(and with %85 of one repetition maximum (1RM) were done. For this purpose in first session randomly, half of the subjects performed protocol A and the other subjects completed the protocol B. One and two minutes rest intervals were set between sets and exercises movement, respectively. One week after, in the second session, subject’s protocols were contrary. Blood samples were collected before the exercise, immediately and 30 minutes after each exercise protocol. Hormone measurements were performed using radio immune-assay (RIA).
Results: By using ANOVA with repeated measure (within and between subject effects) the results indicated that serum leptin concentrations in both protocols, was decreased significantly immediately and 30 minutes after exercise (P≤0.05). So, the testosterone concentration decreased significantly immediately (protocol B) and 30 minutes after exercise (in both protocol) (P≤0.05). While, there was no differences between sessions for leptin and testosterone. Moreover, there was correlation between leptin and testosterone in order B and not in order A (P≤0.05).
Conclusion: Overall findings showed that the large or small muscles order used at the beginning of the exercise do not affect on the secretion hormone leptin and testosterone. Although, more research is needed to prove the link between these two hormones.
Key words: Exercise order, Leptin, Testosterone, Acute resistance exercise
