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Showing 2 results for حجازی

The Relationship Between Peak Oxygen Consumption and Pulmonary Function Indices: Measured by Spirometry and Allometry Equation in Male Students

Seyyed Reza Attarzadeh Hosseini, Keyvan Hejazi,
Volume 6, Issue 3 (Autumn 2016)

Abstract

Purpose: Allometry is a method to express the relationship between physiological and anatomical variables. It can be used to measure the vital capacity through mathematical equations. This study aimed at evaluating lung function indices to estimate the maximal aerobic power by respiratory gas analysis device and the allometric equation.
Methods: This study was a descriptive and correlational research. A total of 80 subjects were chosen by convenience sampling method. Then, their anthropometric characteristics and dimensions of chest circumference (diameter and depth of the chest) were measured, and Bruce test was used to measure maximal aerobic power. The Pearson correlation coefficient and multivariate regression analysis were performed using SPSS 16.
Results: There is a positive and significant relationship between vital capacity and maximal aerobic power (r=0.229, P=0.041) and also between the device vital capacity and formula vital capacity (r=1.00, P=0.00). Accordingly, the following model was developed (chest circumference×0.284)+(age×0.319)+(vital capacity×1.761)+inclination=Maximal oxygen consumption.
Conclusion: According to the study results, there is a significant correlation between device vital capacity and formula vital capacity. Thus, in order to predict the maximal oxygen consumption, in the absence of any other experimental methods, allometric equation can be used.

The Effect of Eight Weeks Resistance Training With and Without Vascular Occlusion on Physical Fitness Indexes, Growth Hormone, and Insulin-like Growth Factor in Male Judokas

Kazem Sabri, Mehrdad Fathi, Keyvan Hejazi,
Volume 7, Issue 3 (Autumn 2017)

Abstract

Purpose: The present study was conducted to investigate the effect of 8 weeks resistance training with and without vascular occlusion on physical fitness indexes, growth hormone, and Insulin-like growth factor 1 (IGF-1) in male judokas.
Methods: In this quasi-experimental study, 20 male judokas were divided into two groups: 1. Traditional resistance training along with judo training without blood vascular occlusion (n=10); and 2. Resistance training group along with judo training with blood vascular occlusion (n=10). Resistance training schedule included 3 sessions per week, each session lasting 45 to 60 minutes for 8 weeks. The comparison of means within and between groups was done by paired sample t test and ANCOVA test, respectively. All statistical analyses were performed with SPSS Version 20. Results were significant at P≤0.05.
Results: The results showed that cardio respiratory endurance (6.28±0.05 vs 6.13±0.09 and 6.29±0.04 vs 6.20±0.09; P=0.001), anaerobic power (41.00±5.27 vs 46.10±4.58 and 38.10±6.21 vs 40.60±6.74; P=0.001), speed (5.92±0.34 vs 5.50±0.30 and 6.14±0.30 vs 6.04±0.31; P=0.001), agility (9.41±0.09 vs 9.26±0.15 and 9.37±0.11 vs 9.33±0.11; P=0.001), muscular endurance (53.60±4.40 vs 69.80±11.47 and 56.10±5.79 vs 60.50±5.91; P=0.001) and power (2.43±0.08 vs 2.50±0.08 and 2.38±0.10 vs 2.41±0.11; P=0.001), changed significantly in both resistance groups with and without vascular occlusion. Growth hormone (1.79±0.35 vs 2.69±0.31 and 1.46±0.20 vs 1.65±0.34; P=0.001) and insulin-like factor growth changed significantly (211.90±5.78 vs 218.80±6.30 and 211.00±6.10 vs 214.30±6.12; P=0.001). Concerning intergroup means changes in variables of cardio respiratory endurance (P=0.03), anaerobic ability (P=0.02), speed (P=0.03), agility (P=0.03), muscular endurance (P=0.007), power (P=0.01), growth hormone (P=0.01) and insulin-like growth factor (P=0.03), there was a significant change between two groups of resistance training with vascular occlusion and without vascular occlusion.
Conclusion: Eight weeks of resistance training with and without vascular occlusion, improved motor-physical fitness indexes and increased growth hormone and insulin-like growth factor in male judokas.

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