Volume 24, Issue 1 (April & May 2021)
J Arak Uni Med Sci 2021, 24(1): 136-149 |
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Vakili J, Sari Sarraf V, Khanvari T. Effects of High-intensity Interval Training on Body Composition and Hormone Growth Agents in Overweight Adolescent Boys. J Arak Uni Med Sci 2021; 24 (1) :136-149
URL: http://jams.arakmu.ac.ir/article-1-6326-en.html
URL: http://jams.arakmu.ac.ir/article-1-6326-en.html
1- Department of Exercise and Sport Physiology, Faculty of Physical Education and Sports Science, University of Tabriz, Tabriz, Iran.
2- Department of Exercise and Sport Physiology, Faculty of Physical Education and Sports Science, University of Tabriz, Tabriz, Iran. ,milad_felps@yahoo.com
2- Department of Exercise and Sport Physiology, Faculty of Physical Education and Sports Science, University of Tabriz, Tabriz, Iran. ,
Abstract: (2723 Views)
Background and Aim: Obesity is a clinical condition that affects the growth-related hormonal system, especially in adolescents. High-Intensity Intermittent Training (HIIT) might reduce such destructive effects.
Methods & Materials: In this quasi-experimental research, among adolescent boys [age: 13-18 years, height: 154±8 cm, Body Mass Index (BMI): 27.05±1.4 kg/m²], 30 volunteer subjects were selected. The study participants were divided into 3 groups of short-term and long-term periodic exercises as well as controls. The short-term exercise group performed 9 bouts of 30 seconds with 150-second breaks between sessions; the long-term exercise group performed 4 bouts of 150 seconds with 240-second breaks between sessions 3 times a week for 8 weeks. Body composition and blood samples were obtained 48 hours before and after conducting the training protocol to measure the desired parameters. The changes of each index were analyzed by repeated-measures Analysis of Variance (ANOVA) at the significant level of P<0.05.
Ethical Considerations: This study was approved by the Ethics Committee of Tabriz University (Code: IR.TABRIZU.REC.1398.021).
Results: After 8 weeks of HIIT, growth hormone increased and thigh, arm circumference, and fat percentages decreased (P<0.05). However, no changes were detected in the insulin-like growth factor I, BMI, and weight of the examined subjects (P>0.05).
Conclusion: Short- and long-term HIIT have the potential to improve the growth hormone status and body composition of overweight adolescents.
Methods & Materials: In this quasi-experimental research, among adolescent boys [age: 13-18 years, height: 154±8 cm, Body Mass Index (BMI): 27.05±1.4 kg/m²], 30 volunteer subjects were selected. The study participants were divided into 3 groups of short-term and long-term periodic exercises as well as controls. The short-term exercise group performed 9 bouts of 30 seconds with 150-second breaks between sessions; the long-term exercise group performed 4 bouts of 150 seconds with 240-second breaks between sessions 3 times a week for 8 weeks. Body composition and blood samples were obtained 48 hours before and after conducting the training protocol to measure the desired parameters. The changes of each index were analyzed by repeated-measures Analysis of Variance (ANOVA) at the significant level of P<0.05.
Ethical Considerations: This study was approved by the Ethics Committee of Tabriz University (Code: IR.TABRIZU.REC.1398.021).
Results: After 8 weeks of HIIT, growth hormone increased and thigh, arm circumference, and fat percentages decreased (P<0.05). However, no changes were detected in the insulin-like growth factor I, BMI, and weight of the examined subjects (P>0.05).
Conclusion: Short- and long-term HIIT have the potential to improve the growth hormone status and body composition of overweight adolescents.
Keywords: High-Intensity interval training, Overweight, Insulin-Like growth factor I, Growth hormone
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