Response and adaptation to exercises
Zahra hosseinzadeh barkusaraie; Atefeh Akef; Hamid Arazi; Javad Mehrabani; farhad rahmani nia
Abstract
Introduction & objective: Resistance training is one of the types of training methods that has the potential to improve strength, endurance and muscle strength and reduce the rate of injury and increase athletic performance in young athletes.Method: the sample size was 30 young active women (age: ...
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Introduction & objective: Resistance training is one of the types of training methods that has the potential to improve strength, endurance and muscle strength and reduce the rate of injury and increase athletic performance in young athletes.Method: the sample size was 30 young active women (age: 26.61±4.55 years, height: 166.3±4.67 cm and weight: 60.08±6.05 kg). They performed an 8-week training course, three sessions per week/1 hour. Agonist and antagonist muscles were trained in the superset and compound set protocols. The movement sets for each muscle were 4 sets. The intensity of exercise was between 80-95% RM. Rest intervals between each set were also 2 minutes. Results: The compound and superset resistance trainings had a significant effect on salivary levels of cortisol, testosterone and cortisol/testosterone ratio in young female athletes (p<0.05). This significant difference was observed in the comparison between the compound-control and superset-control groups (p<0.05).Conclusion: It seems that both training methods, especially the superstar drills, were able to affect the limb environment, muscle strength and endurance, and the percentage of body fat in active young women.
Exercise Science
Aghaali Ghasemnian; ahmad azad; mohamadreza seraji vatan
Abstract
Introduction: The purpose of this study was to determine the effect of 70percent reduction in training loade during the tapering on serum levels of cortisol, testosterone and performance changes in trained swimmersMethods: In this quasi-experimental study, 20 trained male swimmers were selected by available ...
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Introduction: The purpose of this study was to determine the effect of 70percent reduction in training loade during the tapering on serum levels of cortisol, testosterone and performance changes in trained swimmersMethods: In this quasi-experimental study, 20 trained male swimmers were selected by available sampling method and participated voluntarily in the study. Then based on the record of 200m freestyle, the subjects were divided into two groups: Taper(n=10) and control(n=10). Both groups initially Participated in6 weeks in incremental exercises training. Then the taper group spent the 14-day period with a 70% reduction in training load and the control group continued training with the same load as before. In both groups, performance tests (upper and lower body strength) and blood samples (for measurement of serum testosterone, cortisol and testosterone / cortisol ratio) were taken at the beginning of the taper and after the end of this period. For determination of testosterone and cortisol levels, ELISA kits was used. Data were analyzed using, paired t-, and covariance tests. Results: The results indicated that after the tapering , there was a significant difference between the two groups in swimming performance (200m freestyle), upper and lower strength, serum cortisol levels, and the ratio of testosterone to cortisol(P< 0/05). However, there was no significant difference in testosterone levels between the two groups(P> 0/05).Conclusion: The findings of this study showed that taper plan with 14-days, improved anabolic conditions and performance in trained swimmers.
A Mostafalou; SAR Hosseini Kakhak; AH Haghighi
Abstract
Aim: Soccer due to its own functional characteristics rely more on some physiological factors than other sports. The purpose of this study was to assess the effect of resistance training with emphasis on eccentric phase with and without blood flow restriction and traditional resistance training on blood ...
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Aim: Soccer due to its own functional characteristics rely more on some physiological factors than other sports. The purpose of this study was to assess the effect of resistance training with emphasis on eccentric phase with and without blood flow restriction and traditional resistance training on blood cortisol, endurance performance and anaerobic power in male soccer players. Method: Forty soccer players were selected and randomly divided into four groups include traditional strength training (n=10), eccentric resistance training with blood flow restriction (n=10), eccentric resistance training without blood flow restriction (n=10) and control (n=10). Blood sampling and tests were taken before and after the eight-week training period. A one-way repeated-measures and Bonferroni post-hoc test was used to compare the groups (P<0.05). Results: The results showed that the minimum, maximum, mean power and endurance performance in all three experimental groups had a significant increase after exercise (P<0.001). There was also a significant difference between the two groups experimental of resistance training eccentric with and without blood flow restriction at minimum power (p<0.05). There was a significant difference between resistance training eccentric with blood flow restriction and the traditional resistance training group at maximum and mean power. However, this effect was not significant for fatigue index (p=0.13) and cortisol hormone (p=0.33). Conclusion: Although the results related to the percentage of changes indicated an improvement in the anaerobic power and endurance function in the traditional exercise group compared to the other two training groups, traditional exercises could still be used.
Alireza Paahoo; Vahid Tadibi; Naser Behpoor
Volume 5, Issue 1 , June 2015, , Pages 45-58
Abstract
Aim: Obesity and overweight along with metabolic disorders associated with them is one of the very important concerns in today’s world. According to the fact that chihdren and adolencrs bodies are in asensetive stage of growth and preparation for aduhthood, we aim to review the effects of ...
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Aim: Obesity and overweight along with metabolic disorders associated with them is one of the very important concerns in today’s world. According to the fact that chihdren and adolencrs bodies are in asensetive stage of growth and preparation for aduhthood, we aim to review the effects of high intensity interval training over the course of 12 weeks on testosterone, cortisol and lipids profiles levels in obese and overweight. Method: In this study 20 boys were selected based on per- post test in to control and high intensity interval training (HIIT) groups.Anthropometric measures, maximal aerobic speed (MAS), cortisol and testosterone levels, and lipid profile were measured in all subjects before and after training. Training group participated in a training program at 100 to 110% of MAS and 3 times per week during 12 weeks. Independent t-test and Paired t-test with a significance level of (P≤0/05) was used to analysis variables. Results: Following the training program, in training group, anthropometric measures including weight, BMI, percentage body fat and waist-hips ratio and cortisol resting level, TC, TG, LDL-C decreased, and HDL-C increased but no effect on testostron resting levels. In control group, anthropometric measures and TC, TG, LDL-C increased, while HDL-C decreased. Conclusion: Prescribing ideal training course to help obese boys has not been recognized yet But, the finding in this research shows that periodic intence work out has a economic potential, and the efficiency of training Protocol for overweight and obese people, especially children and adolescents.
Vahid Sari-Sarraf; Zakiyeh Tavakoly; Ramin Amirsasan
Volume 2, Issue 2 , July 2012, , Pages 101-112
Abstract
Abstract
Aim: To examine whether time of day significantly affects salivary IgA, cortisol, α amylase and total protein levels before and after sub-maximal swimming.
Method: Fourteen female swimmers (age 13±1.33 years, weight 48±4.75 kg, Vo2max 45.92±3.96 ml/kg/min) volunteered to participate in ...
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Abstract
Aim: To examine whether time of day significantly affects salivary IgA, cortisol, α amylase and total protein levels before and after sub-maximal swimming.
Method: Fourteen female swimmers (age 13±1.33 years, weight 48±4.75 kg, Vo2max 45.92±3.96 ml/kg/min) volunteered to participate in the study. In a fully randomized, cross over design, each subject performed 10×200 m front crawl at 80% of their seasonal best time, with one minute rest between each 200 m, at 08:00 and 18:00 hours on two days aware. Timed, unstimulated saliva samples were collected before and after exercise. Saliva samples were analyzed by two-factor analysis of variance (ANOVA) with repeated measures. Statistical significance was accepted at p
Majid Baghdarnia; Hojatallah Nikbakht; Mohammadali Azarbayjani
Volume 1, Issue 1 , April 2011, , Pages 51-60
Abstract
AbstractAim: The purpose of this study was to examine the effects of progressive interval training on serum testosterone to cortisol ratio in elite male karate athletes.
Method: Fourteen healthy, physically active males karateka with aged 20.36±3.43 yr, height: 175.71±5.96 cm, weight: 73.43±5.76 ...
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AbstractAim: The purpose of this study was to examine the effects of progressive interval training on serum testosterone to cortisol ratio in elite male karate athletes.
Method: Fourteen healthy, physically active males karateka with aged 20.36±3.43 yr, height: 175.71±5.96 cm, weight: 73.43±5.76 kg were recruited for participation in this study. All subjects trained three days a week for five weeks. The intensity and duration of exercise increased from first to fourth weeks and then return to the level of beginning in the fifth week (taper). To identify the level of testosterone and cortisol at rest and after exercise, 10 ml venous blood samples were collected before and immediately after exercise at the beginning of first week and at the end of fourth and fifth weeks.The hormonal assays were performed by using commercially available Enzyme Linked Immunosorbant Assay (ELISA) kits.
Results: No Significant difference was observed between concentration of serum testosterone, cortisol and testosterone to cortisol ratio in week one compare to week four. However, with reduction of training intensity at fifth week the concentration of testosterone significantly decreased (P
