GENÇ FUTBOL OYUNCULARININ OKSİJEN TÜKETİMİ KİNETİKLERİNİN MEVKİLERİNE GÖRE KARŞILAŞTIRILMASI

Öz

Bu çalışmanın amacı genç futbol oyuncularının oksijen tüketimi kinetikleri ile solunum eşiği değerleri arasındaki ilişkiyi belirlemek ve oyuncuların mevkilerine göre oksijen tüketimi kinetikleri ve solunum eşiği değerlerini karşılaştırmaktır. 23 genç futbol oyuncusu gönüllü olarak çalışmaya katılmıştır (n = 23, yaş: 19.8±0.4 yıl, boy uzunluğu: 179.4±7.2 cm., vücut ağırlığı: 74.2±7.4 kg., VO2max: 59.7±8 ml/kg/dk.). Maksimum oksijen tüketimi (VO2max) ve solunum eşiği değerleri, koşu bandında uygulanan ve koşu hızı giderek artan test protokolüyle belirlenmiştir. Daha sonra VO2max değerine tekabül eden koşu hızında test uygulanmıştır ve oksijen tüketim kinetiği değerleri mono-exponentinal model yardımıyla belirlenmiştir. VO2max değerinin % 95’ine ulaşılan süre ve VO2max değerinde geçirilen süre, oksijen tüketimi kinetikleri olarak kabul edilmiştir. VO2max değerinin % 95’ine ulaşılan süre, VO2max değerinde geçirilen süre ve solunum eşiği değerleri arasındaki ilişkiler korelasyon analiziyle, mevkilere göre farklılıklar ise tek yönlü varyans analiziyle belirlenmiştir. VO2max değerinin % 95’ine ulaşılan süre ile VO2max değerinde geçirilen süre arasında negatif yönlü ve anlamlı bir ilişki tespit edilmiştir (r=- 0.526, p<0.05). VO2max değerinin % 95’ine ulaşılan süre hariç olmak üzere diğer değerler bakımından oyuncuların mevkileri arasında anlamlı farklılık görülmemiştir. VO2max değerinin % 95’ine ulaşılan süre bakımından stoper oyuncularının kalecilerden daha yüksek değerlere sahip olduğu (p < 0.05), diğer mevkiler arasında ise herhangi bir farklılık olmadığı belirlenmiştir. Sonuç olarak egzersizde steady-state seviyesine kısa zamanda ulaşmanın VO2max değerinin % 95’ine ulaşılan süreyi kısaltabileceği ve VO2max değerinde geçirilen süreyi arttırabileceği ifade edilebilir.

Anahtar Kelimeler

• Oksijen tüketim kinetikleri, futbol, mevki.

THE COMPARE OF OXYGEN UPTAKE KINETICS OF YOUNG SOCCER PLAYERS ACCORDING TO PLAY POSITIONS

Abstract

The purpose of this study was to compare oxygen uptake kinetics, ventilatory threshold of young soccer players according to playing position and to determine relationship between oxygen uptake kinetics and ventilatory threshold of young soccer players. Twenty-three young soccer players joined to study voluntarily (n=23; age: 19.8±0.4 years, body height: 179.4±7.2 cm., body mass: 74.2±7.4 kg., VO2max: 59.7±8 ml/kg/min.). The players were categorized according to playing positions. The VO2max, ventilatory threshold were determined by incremental treadmill test. Then, treadmill test at running velocity determined VO2max was performed and oxygen uptake kinetics were identified by mono-exponentinal model. The time to achieve 95% of VO2max, spending time at VO2max were accepted as oxygen uptake kinetics. The correlation among time to achieve 95% of VO2max, spending time at VO2max and ventilatory threshold values of young soccer were determined by correlation anlyze and differences according to playing positions were identified by one-way analysis of variance. It was determined significiant negative correlation between time to achieve 95% of VO2max and spending time at VO2max (r=-0.526, p<0.05). The no significiant difference among playing positions was found without time to achieve 95% of VO2max. The centerbacks had higher time to achieve 95% of VO2max values than goalkeepers (p<0.05) but no significiant difference among other playing positions was found (p>0.05). Consequently, it could be said that reaching to steady-state level early during exercise could shorten time to achieve 95% of VO2max and increase spending time at VO2max

Keywords

• Oxygen uptake kinetics, soccer, play position.

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