Türk elit genç kürekçilerde oksijen tüketimi ve laktat profilinin incelenmesi

Bu çalışmada elit genç kürekçilerin laktat ve oksiken tüketimi profillerini analiz ederek ortaya koymak amaçlanmıştır. Çalışmaya 10 elit genç kürekçi gönüllü olarak katılmıştır (yaş 18.8±2.1 yıl). Denekler boy ve vücut ağırlığı ölçümlerinin yanısıra, Avustralya Spor Enstitüsü’nün önerdiği yedi aşamalı kürek ergometresi testini tamamlamışlardır. Protokol giderek artan hızlarda, aralarında birer dakika dinlenme bulunan yedi aşama içermektedir. Dinlenmelerde laktik asit alımı yapılmış ve tüm test süresince oksijen tüketimini ergospirometre ile ölçülmüştür. Oksijen tüketimi, 4 mmol laktat konsantrasyonuna karşılık gelen oksijen tüketimi, kalp atım hızı, iş yükü, güç, maksimal oksijen tüketimi yüzdesi gibi değerler saptanmıştır. Maksimal oksijen tüketimi değerleri 58,88 ± 3,8 ml/kg/dk olarak ölçülmüş, 4 mmol laktat seviyesindeki oksijen tüketiminin maksimal oksijen tüketimine yüzdesi 80,98±4,5% olarak hesaplanmıştır. 4 mmol laktat seviyesindeki oksijen tüketimi ve kalp atım hızı sırasıyla 43,47 ± 4,13 ml/kg/dk, 179,7±12,17 atım/dk olarak bulunmuştur. Sonuç olarak, uluslararası kürekçilerle karşılaştırıldığında elit genç Türk kürekçilerin $VO_{2Max}$ değerleri benzer bulunmasına karşın anaerobik eşikteki güç ve oksijen tüketimi değerleri daha düşüktür.

Investigation of oxygen consumption and lactate profiles in Turkish elite junior rowers

Purpose of this study was to analyze and demonstrate lactate and oxygen consumption profiles of elite junior rowers. Ten rowers participated in this study voluntarily (age 18,2 ±2,9years). Besides the measurements of height and weight, subjects performed incremental seven step rowing ergometer test which is recommended by Australian sports institute. The protocol consisted of 7 progressive stages with 1 min rest intervals. Blood samples for lactate analysis (LA) were collected at rest. Oxygen uptake kinetics also measured via ergospirometer during test. VO2, percent $VO_2$, power, workload and heart rate at 4 mmol lactate level were determined.. $VO_{2Max}$ values of subjects were determined as 58,88 ± 3,8 ml/kg/min. Percent $VO_{2Max}$values at 4 mmol were found 80,98±4,5%. VO2 and heart rate at 4mmol lactate was 43,47 ± 4,13 ml/kg/min, 179,7±12,17 beats per minute, respectively. As a result, although $VO_{2Max}$ values of Turkish elite junior rowers were found to be similar to international class rowers, peak power output and VO2 values at 4 mmol lactate levels found lower.

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