The Effects of Strength and Endurance Training with High-Intensity Resistance Courses on Physical Fitness and Levels of Cortisol, Testosterone, and Human Growth Hormone (HGH) among Adolescent Taekwondo Athletes in Rasht, Iran
Subject Areas : Journal of Physical Activity and Hormones
1 - دانشجوی دکترا رشته تربیت بدنی، فیزیولوژی ورزشی، دانشگاه آزاد اسلامی واحد رشت
Keywords: Taekwondo, Resistance and endurance training, Hormone, Cortisol, Testosterone, Human growth hormone (HGH),
Abstract :
Strength and endurance training has experienced a surge in popularity in recent years and is currently one of the most commonly practiced methods of training. This study investigated the effects of high-intensity resistance and endurance training courses on physical fitness and levels of cortisol, testosterone, and human growth hormone (HGH) among adolescent taekwondo athletes in Rasht , Iran. This was a quasi-experimental study based on a pretest-posttest design with a control group. The participants included 20 male taekwondo players who were randomly selected from a pool of 40 individuals with a mean age of 17 years and more than two years of experience in practicing taekwondo. After the participants were randomly assigned to the control group (regular training) and resistance and e
ndurance training (test group), they were evaluated in terms of age, height, weight, and some physical fitness parameters such as aerobic capacity (shuttle run test) and anaerobic capacity (Bosco test). Moreover, 10 ml of blood was taken from the arm vein of participants both before and after the study to measure the levels of cortisol, testosterone, and HGH. The data obtained were statistically analyzed using descriptive statistics (mean, median, and standard deviation) and inferential statistics (t-test). Results showed a significant increase in the cortisol level and anaerobic capacity in both the test and control groups (p<0.05). In addition, the resting metabolic rate (RMR) increased in the test group and cortisol level decreased in the control group (p<0.05), but aerobic capacity reduced in both groups (p<0.05).
Conclusion: The study findings suggest that high-intensity resistance and endurance training can improve some physiological parameters and positively affect the general health of athletes.
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