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Hakim Sabzevari University
Roya Askari, PhD
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Halima Vahdatpour
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Showing 3 results for bolboli

Reza Farzizadeh, Lotfali Bolboli,
Volume 9, Issue 17 (Volume 17, Number 1, 2016-2017 2017)

Introduction: Rapid weight loss in lower weight classes of wrestling tournament is an important issue in the field. Purpose: The aim of this study was to investigate the effects of two types of programs of rapid weight loss on heart muscle cell damage and the related index levels.
Methodology:Sixteen young wrestlers (age:18±1.31 years, weight:71.68±13.17 kg, height: 171±6.40 cm) in the form of crossover were randomly divided into two groups (the first group with a weight loss of 2% and the second group with a weight loss of 4% of body weight). Blood samples were analyzed in four stages: before, immediately after, 6, and 24 hours after losing weight. Repeated measures ANOVA was employed and Bonferroni post hoc test was used to analyze the data in various stages.
Results: At the end of the study, a significant increase in the amount of CK-MB in the two groups was observed immediately after weight loss (p=.009). However, this association was unstable and 24 hours after the normal weight loss, CK-MB  reached its normal level. Also, a significant increase in serum LDH levels was observed in the two groups' weight loss (p=.008), while no changes in CK levels were observed in the two groups.
Conclusion: It seems that rapid weight loss by 2% to 4% of body weight can cause serious heart damage. In addition, CK-MB and LDH enzymes showed that rapid weight loss was due to increased levels of these enzymes. Obviously, it is necessary to do further research.
Marefat Siahkouhian, Leila Fasihi, Aidin Valizadeh, Abbas Naghizadeh, Lotfali Bolboli,
Volume 19, Issue 19 (Volume 19, Number 1, 2018 2018)

Introduction: Quantifying the relationship between volume and intensity as key components of training is a precise manner that is complicated for most coaches. The aim of this study was to quantify the inverse relationships between training volume and intensity during exhaustive treadmill running among active young men.
Methods: 32 active young men aged 21 years selected as subjects and completed four exhaustive treadmill running in the four separate phases at 70%, 80%, 90%, and 100% VO2 with at least 72 hours rest intervals. The inverse relationship between regression.
Results: The results showed that the inverse relationship between volume and intensity of exhaustive treadmill running obeys a second-order polynomial regression where the volume of exercise (VE min) is a function of exercise intensity (EI beat/min) (VE min= 0.0225(HR beat/min) 2 – 9.4672 (HR beat/min) +997.91).
Conclusion: It can be concluded that the inverse relationship between volume and intensity of exhaustive treadmill running is non-linear and the fitted equation can be used to predict the volume of exercise based on the exercise intensity among active young men.

Mr Asgar Iranpour, Dr Lotfali Bolboli,
Volume 23, Issue 23 (Volume 23, Number 1, 2020 2020)

Introduction and purpose: Cardiac response to body core temperature variation measured with the very low-frequency parameter of heart rate variability. The aim of this study was to investigate the variability of very low frequency due to different temperatures of aerobic training in water and dry.
Materials and methods: 40 academic active male were selected as research subjects. Then, all subjects were randomly divided into different groups of research (control=10; aerobic training on a treadmill=10; aerobic training in water with normal temperature=10 and aerobic training in hot water=10). In the pre-test and after the intervention, the parameter of very low frequency was measured using a heart rate monitor Holter. In order to compare differences in the research stages, analysis of variance in repeated measures was used.
Results: The results of this study showed that compared with control group, performing 21 consecutive days aerobic exercise in drought conditions at 20°C significantly increased in values of low-frequency waves (P=0.02) and very Low frequent (P=0.04). Performing aerobic exercise in water at 29°C in values of low frequency waves (P=0.21) and very low frequency (P=0.35) and water at 39 ° C in values of low frequency (P=0.18) and very low frequency (P=0.41) does not change significantly.
Discussion and Conclusion: In conditions of dry aerobic exercise due to sweating, surface and the central temperature reduced and the heart rate variability increased. The condition of the aquatic environment and different water temperatures do not have significant effect on heart rate variability. 

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