Relationship between chronological age and biological age with strength, speed, agility,,power and balance of Kyokushin Karate
Subject Areas : Physiology of Fitness
Aboozar Yoosefi Roodbardeh
1
,
Mohammad Reza Fadaei Chafy
2
1 - MA Of Exercise Physiology, Department of Physical Education and Sport Science, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran.
2 - Assistant Professor, Department of Physical Education and Sport Science, Faculty of Humanities, Rasht Branch, Islamic Azad University, Rasht, Iran.
Keywords: Karate, Chronological age, Biological age, Physical readiness,
Abstract :
Background : The physical growth pattern is driven by the genetic, but under the influence of environmental factors such as exercise, there may be changes in growth patterns and chronological and biological age may not match. The aim of the present study was to determine the relationship between calendar age and biological age with strength, speed, agility and balance of Kyokushin karate boys in Rasht. Method: The present study was a correlational descriptive study. The population of this research was Kyokushin Karate boys aged 12-30 of from Rasht city, 55 of them were selected non – randomly and available as a sample. In order to measure the research variables, physical fitness tests (strength, speed, agility, power and balance) and body composition (BMI and body fat percentage) were used. Data were analyzed using Pearson's correlation coefficient and t-statistics to compare two correlation coefficients.Results: The results showed that there is a positive and significant relationship between chronological age and anaerobic power, hand strength, agility and static and dynamic balance(p< 0.05). Also, there is a positive and significant relationship between biological age and anaerobic power, hand strength, agility and dynamic balance(p< 0.05). Conclusion: With the increase in the chronological and biological age of karate practitioners, we saw an increase in power and strength; however, speed decreased, which was not far off as body size increased. Also, static balance was only associated with increasing chronological age, which probably indicates that the growth of the skeletal-muscular system during puberty exceeds motor and balance growth.
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