The Effect of Energy Drinks on Endurance Performance in Female Athlete Students
Fahimeh
Kazemi
دانشجوی دکتری فیزیولوژی دانشگاه شهید بهشتی
author
Abbas Ali
Gaeini
استاد دانشگاه تهران
author
Mohammad Reza
Kordi
استادیار دانشگاه تهران
author
text
article
2010
per
Energy drink consumption by athletes has become increasingly popular. The aim of this study was to determine the effect of phantom and dragon energy drinks on female athlete students. For this purpose, twelve female athlete students of Tehran University (age 22+0.63 years, height 162.1+5.8 cm, weight 56.91+6.79 kg) volunteered to participate in this study and performed three sessions of a Bruce treadmill test with 4-day intervals. In each session, in a double-blind, randomized and counterbalanced design, 6 ml/kg/bw of phantom, dragon or placebo was consumed 40 minutes before the exercise test. Results showed that dragon and phantom consumption resulted in a significant difference between VO2max, time of exhaustion and perceived exertion in the posttest (P0.05). Dragon significantly increased HRmax when compared to phantom and placebo (P
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23831_fa8dec3fd6b6de8c2e15ca7638ba092f.pdf
The Effect of Endurance Training and Iron Supplement on Anemic Indexes and Cytochrome C Oxidase in Lower Limb Muscles of Rats
Mohamadali
Samavatsharif
استادیار دانشگاه بوعلی سینا همدان
author
Ali Asghar
Ravasi
استاد دانشگاه تهران
author
Baqir
Minaei
دانشیار دانشگاه علوم پزشکی تهران
author
Ebrahim
Javadi
دانشیار دانشگاه علوم پزشکی تهران
author
Mohammad Reza
Kordi
استادیار دانشگاه تهران
author
text
article
2010
per
Research has shown that chronic, long and exhausting endurance training programs cause iron deficiency. This problem can have a negative effect on physical performance. The aim of this research was to study the effect of endurance training and iron supplement on anemic indexes [hemoglobin (Hb), hematocrit (HCT), red blood cell (RBC), total iron binding capacity (TCBC) and ferritin], and cytochrome C oxidase (COX) enzyme in male rats. Forty male wistar 4848 rats with an average weight of 321.55+22.67 were divided into four groups: experimental group I, experimental group II, control I, and control II. Experimental group I were trained to perform endurance running on a treadmill for 12 weeks (with an intensity of 32 m.min-1 for 60 minutes every session, five sessions a week) (T). Experimental group II received 800 micrograms of iron supplement (ferrous sulfate) daily (gavage) in addition to being trained to perform endurance running on the treadmill (Ti). Control group I were sedentary (inactive) for 12 weeks (S) and control group II did not perform any exercise but received iron supplement as did experimental group II (Si). After 12 weeks, rats were killed by the easy method. Blood samples were analyzed for anemia indexes in the laboratory. Muscle soleus COX was measured by cytochrome C oxidase assay kit. The data were analyzed by one-way ANOVA with (P
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23832_77059a8c5dc80b7fd3326eb44294e890.pdf
The Effect of 6 Weeks of Aerobic Training and L-Carnitine Supplement on Body Fat Percent and Serum Lipid Profiles in Active Men
Amir Hosayen
Haghighi
استادیار دانشگاه تربیت معلم سبزوار
author
Mehdi
Foroughian
کارشناس ارشد دانشگاه تربیت معلم سبزوار
author
M
Hamedi nia
دانشیار دانشگاه تربیت معلم سبزوار
author
Maryam
Chamri
کارشناس ارشد تغذیه و بیوشیمی دانشگاه علوم پزشکی تهران
author
text
article
2010
per
The aim of this study was to determine the effect of 6 weeks of aerobic training and L-carnitine supplement on body fat percent and serum lipid profiles in active men. The method used was semi-experimental. Eighteen active men were selected voluntarily and randomly divided into two groups of experimental (nine individuals with the average age: 44.4+8 years, weight: 8.2+16.6 kg, height: 173+6 cm, BMI: 26.9+4.8 kg/m2) and control (nine individuals with the average age: 48.8+8 years, weight: 82.8+9.5 kg, height: 169+0.05 cm, BMI: 29+3.8 kg/m2). Both groups performed aerobic training based on the principle of overload for 6 weeks. During this period, the experimental group consumed 10 mg/kg/day L-carnitine orally (average less than 1 gram/day) and control group ingested 2.5 mg/kg/day B1 vitamin as placebo. Before and after aerobic training, blood samples were gathered. In addition, aerobic power and body composition were measured. The data were analyzed using Kolmogorov Smirnov, paired, independent t test and ANCOVA. The results showed that aerobic training and L-Carnitine supplement significantly reduced body fat percent (P
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23833_f95d7cb5fba12b8464162fc8b4a0c7fb.pdf
The Response of Vascular Endothelial Growth Factor to Exhausted Submaximal Exercise and Its Relationship with VO2max
Hossein
Taheri Chadorneshin
کارشناس ارشد تربیت بدنی دانشگاه شهید بهشتی
author
Maryam
Nourshahi
دانشیار دانشگاه شهید بهشتی
author
Kamal
Ranjbar
کارشناس ارشد تربیت بدنی دانشگاه شهید بهشتی
author
text
article
2010
per
The aim of this study was to investigate the response of vascular endothelial growth factor (VEGF) to a bout of exhausted submaximal exercise and its correlation with VO2max in different bouts. Therefore, 12 active men (mean age: 24 years) were randomly selected and performed the submaximal exercise. Blood samples were collected before, immediately and two¬¬ hours after the exercise training. Data were analyzed using one-way ANOVA and Pearson correlation coefficient (a=0.05). Serum VEGF increased significantly immediately (p=0.000) and two hours after the exercise (p=0.000). In addition, there was no significant relationship between serum VEGF and VO2max before the exercise training (p=0.352) while there was a significant relationship immediately (p=0.006) and after two hours (p=0.026) after the exercise. In conclusion, one bout of exhausted submaximal exercise can be a stimulus to increase angiogenic factor of VEGF and the more the subjects’ aerobic power, the more they might experience angiogenesis.
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23834_780a2b02b4b05dd99e9a5108e35e0735.pdf
The Effects of Combined Exercise Training on Some Anthropometric Variables in Postmenopausal Women with Breast Cancer
Reza
Nuri
دانشجوی دکتری فیزیولوژی ورزشی دانشگاه گیلان
author
Arslan
Damirchi
دانشیار دانشگاه گیلان
author
Farhad
Rahmani
استاد دانشگاه گیلان
author
Nader
Rahnama
دانشیار دانشگاه اصفهان
author
text
article
2010
per
Overweight and elevated BMI can increase the risk of breast cancer in postmenopausal women. On the other hand, it seems that exercise training affect weight and BMI. The aim of this study was to investigate the effects of exercise training on some anthropometric variables in postmenopausal women with breast cancer. Thus, 29 postmenopausal women with breast cancer who received surgery, chemotherapy and radiation-therapy were divided into two groups, intervention and control. Subjects of intervention group performed 15 weeks of exercise training including walking (2 sessions per week) and resistance training (2 sessions per week, different from walking days). Before and after 15 weeks, weight, BMI, WHR, Vo2max, blood pressure and rest heart rate were measured in two groups. Data were analyzed using ANOVA. Results indicated significant differences in weight, BMI, WHR, Vo2max and rest heart rate between intervention and control groups (p
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23835_d69fe513299de025209c06b05f09552c.pdf
Neuromuscular and Functional Adaptations to Selected Plyometric Training vs. Combined Resistance and Plyometric Training
Vahid
Vali Pour
دانشجوی دکتری دانشگاه تربیت مدرس
author
Reza
Ghara khanlou
دانشیار دانشگاه تربیت مدرس
author
Fatima
Rahbarizade
استادیار دانشگاه تربیت مدرس
author
Seyed Javad
Mola
دانشیار دانشگاه تربیت مدرس
author
text
article
2010
per
Physical fitness is considered as a key component for optimal performance in most sports. The aim of this study was to investigate neuromuscular and functional adaptations to two different training methods. For this purpose, 14 male volunteers were divided randomly into two groups. Group A (plyometric) trained with plyometric training and group B (combined) trained with traditional resistance training combined with plyometric training 3 days per week for 8 weeks. To evaluate muscle neural activity, before and after training programs, surface EMG was performed on vastus lateralis muscle. Also, to determine muscle strength and power, agility and speed of movement, 1RM, Bosco, Sargent jump, Hexagonal Obstacle and 35 m dash tests were used, respectively. Paired t-test and independent t-test were used to identify any significant differences (p?0.05). Results showed that SEMG increased in both groups (plyometric group 30.27%, p?0.11; combined group 43.78%, p?0.05). In Bosco, Sargent jump, Hexagonal Obstacle and 35 m dash tests, plyometric group had better results than combined group but in 1RM test combined group had better results than plyometric group. It can be concluded that possibly, for short-term periods (8 weeks), plyometric training alone would be more effective than combined training (resistance and plyometric) in targeted exercise performance.
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23836_4baa3597ac684ab41cb0e4316e486074.pdf
The Effects of Repeated Aerobic Dance with Different Durations on Salivary Cortisol, Testosterone and Mood of Inactive Women
Sara
Sadroashrafi
کارشناس ارشد تربیت بدنی دانشگاه آزاد اسلامی واحد تهران مرکز
author
Mohammad Ali
Azarbayejaani
عضو هیأت علمی دانشگاه آزاد اسلامی واحد تهران مرکز
author
Yasmin
Kiazad
کارشناس ارشد تربیت بدنی دانشگاه آزاد اسلامی واحد تهران مرکز
author
Golnoosh
Sedgh Rouhi
کارشناس ارشد تربیت بدنی دانشگاه تهران
author
Masoud
Sadrolashrafi
عضو هیأت علمی دانشگاه بوعلی سینا
author
text
article
2010
per
The present research was performed to investigate the effects of aerobic dance with different durations on salivary cortisol and testosterone,and consequently on the mood and body mass of inactive young women. The design of the research was quasi–experimental and the sample consisted of 19 inactive young women (mean age: 30+3 years, height: 167+5.1 cm, weight: 65.5+7.4) who were randomly divided into two groups: experimental (N=12) and control (N=7). The experimental group performed aerobic dance for 8 weeks with the intensity of 120 metronome strokes. Salivary cortisol and testosterone of all subjects were collected five times during the as well as before and after the dance. A dose of 6 ml salivary solution was obtained before and after the exercise. One–way repeated ANOVA with SPSS were used to analyze the data. The Spearman correlation coefficient was used to determine the relationship among the variables. The findings showed that testosterone concentrations decreased after the exercise and during rest. However, cortisol concentrations increased after the exercise and during rest. Positive relationships were observed between mood and testosterone concentration after the first session. The same result was obtained for cortisol after the sixteenth session. The mood variable had six subcategories out of which only two measures were found to be related with the period of exercise. The final conclusion of the study was that hormonal responses were related to the duration of the aerobic dance exercise. It is suggested that young women be more active and perform daily exercises especially aerobic dance to avoid depression and to be able to feel happier.
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23837_4606e4449a183cbad16342e1d502cde2.pdf
The Effect of 8 Weeks of Selective Exercise Activity and Estrogen Supplement on Satellite Cells in Ovariectomized Rats
Mohsen
Salesi
استادیار دانشگاه شیراز
author
Homa
Sheikhaani
کارشناس ارشد دانشگاه شیراز
author
Bita
Gerami Zade
استاد دانشگاه علوم پزشکی شیراز
author
Nader
Tanide
استادیار دانشگاه علوم پزشکی شیراز
author
text
article
2010
per
The aim of this study was to investigate the effect of 8 weeks of selective exercise activity and estrogen supplement on satellite cells in ovariectomized sprague-dawley rats. At first, subjects were ovariectomized and after one month of complete recovery, they were randomly divided into four groups: Control, Exercise activity, Estrogen supplement, and Exercise and Estrogen supplement. Only exercise and exercise and estrogen groups performed a selective exercise activity for 8 weeks and during this period, estrogen and exercise and estrogen groups were implanted subcutaneously with 0.6 ml estrogen supplement. The obtained data were analyzed using one-way ANOVA. The research results indicated that exercise activity group showed a 1.5 times increase in the number of satellite cells while in exercise and estrogen and estrogen groups they decreased by 68% and 73.9% respectively. Moreover, obtained results demonstrated that observed changes in the number of satellite cells were significant only in exercise group. Aerobic exercise can increase the proliferation of satellite cells in the soleus muscle of rats. This increase in the number of satellite cells is the result of function of the distance running. This study indicated that endurance training can be used as a precondition for increasing muscle volume and improving muscle function.
Journal of Sport Biosciences
University of Tehran
2008-9325
2
v.
7
no.
2010
https://jsb.ut.ac.ir/article_23838_e19faa861973310cc1cdae578e29d8da.pdf