تعداد اعضاء : 3503 نفر
بازدیدهای امروز :111 بار
تعداد کل بازدیدها : 703042 بار
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Volume: 41
Year: 2019
Month: 9
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| Subject
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Biochemistry
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| Title
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Serum levels of Insulin-like growth factor-1 (IGF-I) as an indicator associated with aerobic and anaerobic fitness assessment in adolescent boys
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| Authors
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Ramin Amirsasan; Mostafa Armanfar; Javad Hesari;
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| Abstract
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Background: Insulin-like growth factor -1 (IGF-I) has a variety of roles, But the abundance of scientific evidence indicates that it is a metabolic biomarker associated with indicators of physical fitness and health. The present study examined the relationship between serum levels of IGF-I and aerobic fitness, anaerobic capacity and body fat percent, systolic, and diastolic blood pressure before and after the eight weeks of high intensity intermittent training (HIIT) in adolescent boys.
Methods: In this experimental study, 22 adolescent boys in a randomly and double-blinded design were allocated in two equal groups: HIIT group (N=11) and control group (N=11). Training programs were conducted 3-4 times per week for 8 weeks. The HIIT program consisted of 6-8 running sprints (30-60 seconds) with a 3.5-4 min recovery. Mentioned indicators assessments were performed 18-24 hours pre and post intervention.
Results: IGF-1, Maximum Oxygen uptake (VO2max(, Peak Power Output (PPO) and mean power output (MPO) were significantly higher after 8 week HIIT than the pre-exercise training evaluations (P<0.001). Fatigue index and body fat percent decreased in HIIT trial after 8 week HIIT (P<0.001). Also, there was a significant positive correlation between IGF-I changes and aerobic fitness, anaerobic and body fat percentage. However, Systolic and diastolic blood pressure did not change significantly after the training period (P > 0.05).
Conclusion: The IGF-I can be used as an indicator to assess the fitness of adolescent boys.
Keyword: Aerobic Fitness, Anaerobic Fitness, Insulin-Like Growth Factor -1, Body Fat Percentage, Adolescent Boys
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ISSN 1608-5671 (Print)
ISSN 2008-160X (Online)
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