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 Physiology
Fahimeh Mehrabani; farhad rahmani nia; Javad Mehrabani; Nasrin Razavianzadeh
Abstract
Introduction: Non-alcoholic fatty liver disease (NAFLD) is a condition in which the accumulation of fat in the liver increases. Exercise training can improve the condition by preventing excessive accumulation of fat in the liver as a non-pharmacological intervention and preventing the progression of ...
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Introduction: Non-alcoholic fatty liver disease (NAFLD) is a condition in which the accumulation of fat in the liver increases. Exercise training can improve the condition by preventing excessive accumulation of fat in the liver as a non-pharmacological intervention and preventing the progression of the disease to chronic liver disease. The aim of this study was to compare the effect of combined exercises training with two intensities on FGF-21, insulin resistance, liver enzymes and body composition of women with fatty liver.Materials and Methods: 33 women with NAFLD with a mean age of 57.7 ± 45.43 years and a body mass index of 84.32 6 6 kg/m2 randomly divided into three equal groups; aerobic interval training (AIT); high intensity interval training (HIIT); and controls. The training program was performed for 12 weeks and 3 sessions per week. The variables were measured before and after the training program. Data were analyzed using analysis of variance with repeated measures (p< 0.05). Results: The results showed that HOMA-IR index and serum FGF-21 were significantly reduced in the combined training groups compared to the control (p<0.05). No significant effect or difference was observed in ALT and AST enzyme levels. Also, a significant decrease in body fat percentage was observed (p<0.05). Conclusion: It seems that women with NAFLD are likely to be able to use both combined resistance training intensity and moderate to severe interval as a non-pharmacological solution to reduce fat percentage and improve insulin and FGF-21 resistance.
A Teimoori; F Rahmani-nia; B Mirzaei; R TajBakhsh
Abstract
Aim: The worldwide obesity epidemic has produced profound effects on public health. The purpose of this study was to examine the effects of aerobic training with orlistat on insulin resistance and lipid profile in obese men. Method: Forty-eight obese males (Age: 21.56±2.14, Wehght: 103.53±9.44, ...
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Aim: The worldwide obesity epidemic has produced profound effects on public health. The purpose of this study was to examine the effects of aerobic training with orlistat on insulin resistance and lipid profile in obese men. Method: Forty-eight obese males (Age: 21.56±2.14, Wehght: 103.53±9.44, BMI: 33.9±3.21) participated in this study. The subjects were randomizly divided into four groups: orlistat (O, n=12), exercise (E, n=12), orlistat plus exercise (OE, n=12) and control (C, n=12). Subject in all groups adjusted based on age, height, weight, body mass index and aerobic capacity. Subjects in OE and O groups were consumed three 120 mg orlistat capsules after each meal and for eight weeks. Subjects in OE and E groupps conduct exercise protocol 3 times a week and for 8 weeks. Before and after the exercise program, insulin, glucose, lipid profile, food intake and maximum aerobic power was measured. In statistical analysis, descriptive statistics, paired t-test, one way ANOVA and Tukey post hoc test was used. All data were analyzed using spss and P value less than 0.05 considered statistically significant. Results: At baseline the results showed that insulin resistance and lipid profile no significant differences between the study groups. Insulin resistance in C group compare to o, e and OE groups was reduced significantly (P<0.01). also, lipid profile was improved significantly except HDl in experimental group. Conclusion: The results show that regular aerobic exercise without the use of chemical drugs lead to weight loss is desirable changes in insulin resistance and Improvement of lipid profile.
Payam Saidei; Hamid Mohebbi; Farhad Rahmaninia; Fahimeh Mohammad ghasemi
Volume 4, Issue 2 , December 2015, , Pages 89-108
Abstract
Objective: The aim of the present study was to investigate the effect of 10-week negative energy balance (NEB) methods on adipocyte size and adiponectin levels in different abdominal fat depots as well as glucose and lipid variables and insulin resistance in high-fat-diet obese male wistar rats. Methodology: ...
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Objective: The aim of the present study was to investigate the effect of 10-week negative energy balance (NEB) methods on adipocyte size and adiponectin levels in different abdominal fat depots as well as glucose and lipid variables and insulin resistance in high-fat-diet obese male wistar rats. Methodology: Study sample were consisted of sixty-four Wistar male rats (average weight; 194.5±12.6g). Blood samples were collected at 1st, 18th and 28th weeks after an overnight fasting. After first sampling, remaining 56 rats were randomly divided into control (n=16) and high-fat-diet (n=40) groups. After 18 weeks High-fat-diet group randomly divided into high-fat-diet (HFD) and negative energy balance consisted of calorie restriction, exercise training and combination (exercise training with calorie restriction) subgroups. Negative energy balance subgroups underwent an aerobic training (running) with intensity of 70 to 75% of VO2max, %25 calorie restriction and interval of both methods for 10 weeks. Adiponectin Levels and adipocyte size in retroperitoneal and mesenteric fat depots, insulin and glucose levels and lipid profile were measured. HOMA-IR was also calculated. Results: The results of this study indicated that in comparison to high-fat-diet, negative energy balance methods despite consumption of high fat diet, decreased adipocyte size in retroperitoneal and mesenteric fat depots (P<0.05) and insulin resistance index improved in line with decrease of serum concentrations of insulin, glucose and triglyceride in obese male rats (P<0.05). However although lipid profile improved, only triglyceride concentration significantly decreased (P<0.05). From negative energy balance subgroups only combination showed significant increase in adiponectin levels of studied depots compared to high-fat-diet (P>0.05). Conclusion: This study indicated that negative energy balance methods can actually decrease adipocyte size of retroperitoneal and mesenteric fat depots even with simultaneous consumption of high-fat-diet which is largely congruent with improvement in lipid and metabolic profile Results also indicate a superiority of aerobic training in improving the lipid profile compare to other NEB methods.
Farhad Rahmani-Nia F; Javad Mehrabani; Mahdiheh Zanganeh
Volume 4, Issue 2 , December 2015, , Pages 173-185
Abstract
Objective: Aging in women and the incidence of amenorrhea can lead to eating disorders, obesity and dissatisfaction of their body shape. Methodology: A total of 434 (108 athletes; BMI: 28.27±2.41, and 326 non-athletes; BMI: 35.11±4.13) Iranian women between 35-50 years old, participated ...
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Objective: Aging in women and the incidence of amenorrhea can lead to eating disorders, obesity and dissatisfaction of their body shape. Methodology: A total of 434 (108 athletes; BMI: 28.27±2.41, and 326 non-athletes; BMI: 35.11±4.13) Iranian women between 35-50 years old, participated in this study. The data were collected via a package that was consisted of questionnaires involving demographic, athletic history, menstrual pattern, eating attitude test-26, (The EAT-26 questionnaire) and female body image scale. The body mass index (BMI) was measured to compare actual, perceived and ideal body sizes Data were analyzed by Mann Whitney U and Spearman correlation. Results: The finding showed that there was no significant difference between eating disorder and secondary amenorrhea between athlete and non-athlete groups; but there was significant difference between body dissatisfaction, social pressure to change weight and actual BMI between two groups (P<0.05). The most rate of body dissatisfaction and social pressure to change weight observed in non athletes women (P<0.05). Conclusion: In general, it seems that exercise can reduce eating disorders and body dissatisfaction or fitness contribute to increased performance.
Bahman Mirzaei; Farhad Rahmani-Nia; Mortezah Nastaran
Volume 3, Issue 1 , April 2013, , Pages 71-80
Abstract
Abstract
Aim: Various studies have demonstrated that different rest intervals has a significant effect on hormonal, metabolic, and cardiovascular responses. This factor can lead to different muscle damage responses and manipulate training goals. The purpose of this study was to compare the effect of ...
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Abstract
Aim: Various studies have demonstrated that different rest intervals has a significant effect on hormonal, metabolic, and cardiovascular responses. This factor can lead to different muscle damage responses and manipulate training goals. The purpose of this study was to compare the effect of 1 and 3 minute rest intervals between sets and exercises on muscle damage and sustainability of repetition in consecutive exercises.
Method: 12 untrained subjects (aged 23.17±2.06 years, height 175±3.55 cm, weight 67.33±8.26 kg, fat 16.67±1.82 percent) volunteered to participate in this study in two resistance exercise sessions with a 2-week recovery between sessions. Exercises order in each session consisted of front leg extension, biceps curl, leg curl, triceps extension, leg press and bench press with 80% of one repetition maximum (1RM) until fatigue. Subjects randomized for 1 and 3 min rest intervals in each session. The levels of CK and AST were analyzed before, 24 and 48 hours after resistance exercises. Also muscle soreness was evaluated by the Shailaja scale (PAS) at before, immediately, 24 and 48 hours after resistance exercises. Variance analysis with repeated measurment, pair sample t-test and Bonferroni post-hoc were used for statistical analysis of data.
Results: CK and AST concentration increased significantly after 24 and 48 hours and muscle soreness also elevated immediately, 24 and 48 hours after resistance exercises (P≤0.05), but no significant difference in muscle soreness and enzymes concentration was found between groups at different time points. The results demonstrated that 3 min rest intervals lead to increased repetitions (P≤0.05).
Conclusion: Differences of load volume and sustainability of repetitions at different time points of rest intervals are independent of muscle damage responses and muscle soreness. Also, 3 min rest intervals led to repetition sustainability and appropriate recovery.
Key words: Biochemical markers, Recovery time, Exercise volume
