PhD Student, Department of Exercise Physiology, University of Tehran
PhD Student, Department of Exercise Physiology, Shahid Rajaee Teacher
Training University 4. PhD Student, Department of Exercise Physiology, Shahid
Beheshti University 5. B.Sc., Department of Exercise Physiology, University of
Tehran 6. PhD, ECG Department, Shanzdahe Azar Hospital
(Received: 2013/3/5, Accepted: 2013/8/4)
The aim of this study was to investigate the effect of 6 weeks of resistance training on cardiac morphological indicators in untrained women. For this purpose, 20 sedentary females (mean age 22.6±1.8yr, height 162.3±6.5cm, weight 58±5.1 kg, BF% 18.3±5.2% and surface of body 1.62±0.15m2) were selected to participate in the study. They were randomly assigned to experimental (n=10) and control (n=10) groups. The anthropometric, body composition and echocardiogram tests were carried out before the protocol. Then, the subjects performed 6 weeks of resistance training. Resistance training protocol consisted of 6 performances with weight training in 3 sets with 10 repetitions, at 60-70% of one repetition maximum (1RM). The results showed that after the training protocol, the ventricular wall thickness increased by 10% and left ventricular end-systolic measure dropped down by 10% compared with the control group (P≤0.05). But other factors including posterior wall thickness, end diastolic dimension, left ventricular mass, left atrium volume, total heart volume, left ventricular end systolic volume, left ventricular end diastolic volume and aortic stenosis did not change significantly. The results showed that 6 weeks of resistance weight training can improve the performance and cardiac health in sedentary females as this training significantly affected some variables under study.
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Echocardiogram Factors, Resistance Training, Untrained Females.
Corresponding Author : Tel : 09193665330, Email : [email protected]
Sport Biosciences, Vol.6, No.1, Spring 2014
Listening to Music Decreased Cardiorespiratory Efficiency during Fast Recovery after Exhaustion
Ali Akbarnezhad1 – Hamed Barzegar2 – Rahman Soori3- Elham Vosadi4
1. Assistant Professor, Department of Exercise Physiology, University of Tehran,
Tehran, Iran 2,4. PhD Student, Department of Exercise Physiology, University of Tehran, Tehran, Iran 3. Associate Professor, Department of Exercise
Physiology, University of Tehran, Tehran, Iran (Received: 2013/4/23 – Accepted: 2013/8/6)
The aim of this study was to investigate the effects of different music rhythms (fast rhythm and slow rhythm) on some cardiorespiratory responses of healthy young males during primary minutes of recovery after an exhaustive exercise session. In this semi-experimental study, 17 healthy young males (mean age: 19.76±0.97yr, height: 176±6.72cm, weight: 68.5±5.95kg) voluntarily participated in this study. The subjects performed Bruce protocol until exhaustion in three consecutive sessions with 72 hours of interval between stages of test. Immediately after the exhaustion in each session, the subjects received recovery while listening to the slow rhythm music, fast rhythm music or no music with counter balanced format. The variables (heart rate, cardiac output, stroke volume, minute ventilation, tidal volume, respiratory rate, oxygen consumption and blood pressure) were measured in the 30, 60, 90 and 120 minutes of recovery period. The results showed that listening to music in the first minutes of recovery significantly decreased cardiac output, stroke volume, blood pressure, minute ventilation, tidal volume, oxygen consumption (P˂0.05) and significantly increased respiratory rate and heart rate (P<0.05). The present study showed that listening to music during the recovery immediately after vigorous exercise decreased cardiorespiratory efficiency through decreasing stroke volume and tidal volume and increasing respiratory rate and heart rate.
Cardiorespiratory System, Different Music Rhythms, Exhaustion, Recovery.
Corresponding Author : Tel : 09195322571, Email : [email protected]
Sport Biosciences, Vol.6, No.1, Spring 2014
The Effect of Regular Endurance Exercises and Galbanum Supplement on Vascular Function during Chronic Hypertension in Male Wistar Rats
Zohreh Jalali – Valiollah Dabidi Roshan
1.M.Sc. in Exercise Physiology, Physical Education Faculty, Mazandaran
University, Babolsar, Iran 2. Associate Professor in Exercise Physiology,
Physical Education Faculty, Mazandaran University, Babolsar, Iran
(Received: 2013/5/14 – Accepted: 2013/11/24)
Chronic inflammation is an integral part of cardiovascular diseases and hypertension is found to be associated with endothelial dysfunction. The aim of this study was to evaluate the effect of endurance training and galbanum supplement on parameters related to vascular function including endothelial selectin (E-selectin) and angiotensin converting enzyme inhibitor (ACE-I) as inflammatory and vasoconstriction factors and nitric oxide (NO) as a vasodilation factor during chronic hypertension induced by Nitro-L-arginine methyl ester (L-NAME) in male Wistar rats. 48 male Wistar rats were randomly divided into six groups: 1. basic, 2. sham, 3. L-NAME, 4. endurance training, 5. galbanum and 6. training + galbanum. Groups 3 to 6 received 10 mg/kg L-NAME solutions under peritoneal space five times a week for eight weeks. Also, rats in the sham group received saline under the same condition. Groups 4 and 6 were performed the endurance running protocol on a treadmill with the speed of 15 to 20 meters per minutes for 25 to 64 minutes, 5 times a week for 8 weeks. Groups 5 and 6 received 90 mg/kg galbanum solution using gavage 5 times a week for 8 weeks. Infusion of L-NAME led to hypertension which was detected by a significant decrease in ACE-I (P<0.00). Furthermore, hypertension was associated with increased Eselectin and decreased NO. The training protocol significantly reduced E-selectin (P<0.00) and significantly increased NO (P<0.04) in group 4 and consumption of galbanum significantly decreased E-selectin (P<0.00) in group 5 and the combination of training and galbanum significantly decreased E-selecting (P<0.00) and significantly increased NO (P<0.03) in group 6 compared to L-NAME group at P≤0.05. Chronic hypertension is associated with endothelial dysfunction and nonpharmacological strategies such as endurance training and galbanum antioxidant supplement probably control hypertension through the improvement of vascular endothelial function.
Antioxidant, Endurance Exercise, Hypertension, Nitric Oxide, Vascular Function.
Corresponding Author : Tel :09124734959, Email : [email protected]
Sport Biosciences, Vol.6, No.1, Spring 2014
The Comparison of the Effect of One Session of Exhaustive Swimming and Running on Appetite and Calorie Intake in Healthy Girls
Zohre Davarzani1 – Mohammad Reza Hamedinia2 – Seyyed Ali Reza Hosseini3 Kakhk – Mitra Khademosharie4
1. M.Sc. in Exercise Physiology, Physical Education Faculty, Hakim Sabzevari
University, Sabzevar, Iran2. Associate Professor of Exercise Physiology, Physical Education Faculty, Hakim Sabzevari University, Sabzevar, Iran 3. Assistant
Professor of Exercise Physiology, Physical Education Faculty, Hakim Sabzevari
University, Sabzevar, Iran 4. PhD Student of Exercise Physiology, Physical
Education Faculty, Kermanshah Razi University, Kermanshah, Iran
(Received: 2013/11/18 – Accepted: 2013/12/29) Abstract
The aim of the present study was to examine the effect of one session of exhaustive swimming and running exercise on the appetite and calorie intake in healthy girls. The research design was cross-sectional and 12 female university students (mean age 22.5±1.3 yr, weight 56.07±5.46 kg, body fat percent 27.125±8.316 and BMI 21.175±2.68 kg/m²) voluntarily participated in three modes of control, swimming and running exercise with 8085% intensity of maximum heart rate up to exhaustion. The subjects’ appetite rate was measured two hours before the exercise (fasting), immediately after the exercise, two and eight hours after the exercise through appetite questionnaire. Also, the calorie intake was recorded during, before and after the research protocol. Data were analyzed using ANOVA with repeated measures and one-way ANOVA. The test significance level was taken as P≤0.05. The results showed no significant change in the appetite and calorie intake in one session of swimming and running exercise (P=0.05). It can be concluded that one session of swimming and running had no effect on the appetite and calorie intake. In conclusion, in contrast to what some people believe, one session of exercise does not increase appetite until eight hours and can be used to control and reduce weight. In other words, exercise can balance the calorie intake negatively. This negative balance may not recover in a short-term period and there is no difference between swimming and running in this regard.