TÜRK ELİT GENÇ KÜREKÇİLERDE OKSİJEN TÜKETİMİ VE LAKTAT PROFİLİNİN İNCELENMESİ

Year 2010, Volume: 8 Issue: 2, 77 - 80, 01.06.2010

Fırat Akça Cengiz Akalan Mitat Koz Gülfem Ersöz

https://doi.org/10.1501/Sporm_0000000179

Abstract

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 VO2max değerleri benzer bulunmasına karşın anaerobik eşikteki güç ve oksijen tüketimi değerleri daha düşüktür

Keywords

Laktat, Maksimal oksijen tüketimi, Anaerobik eşik, Kürek

INVESTIGATION OF OXYGEN CONSUMPTION AND LACTATE PROFILES IN TURKISH ELITE JUNIOR ROWERS

Abstract

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 VO2, power, workload and heart rate at 4 mmol lactate level were determined.. VO2max values of subjects were determined as 58,88 ± 3,8 ml/kg/min. Percent VO2Max values at 4 mmol were found 80,98±4,5%. VO2and 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 VO2Maxvalues 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

Keywords

Lactate, Maximal oxygen consumption, Anaerobic threshold, Rowing

References

• Baptista RR, Oliveira, LG, Figueiredo GB, Contieri JR, Loss JF, Oliveira AR. Lactate threshold in rowers: comparison between two methods of determination. Rev Bras Med Esporte 2005; 11(4): 233-236.
• Bunc V, Leso J. Ventilatory threshold and work efficiency during exercise on a cycle and rowing ergometer. Journal of Sports Sciences 1993; 11(1): 43-48.
• Conconi F, Ferrari M, Ziglio PG, Droghetti, P, Codeca L. Determination of the Anaerobic Threshold by Noninvasive Field Test in Runners. Journal of Applied Physiology 1982; 52(4): 869-873
• Droghetti, P.,Jensen, K.,Nilsen,T.S. (1991). The total estimated metabolic cost of rowing. FISA coach 1991;2: 1-4.
• Garrett WE, Kirkendall DT. Exercise and Sport Science. Philadelphia: Lippincott Williams & Wilkins; 2000.
• Gore Physiological Tests for Elite Athletes. Human Kinetics: USA; 2000.
• Gullstrand L. Physiological responses to short-duration high-intensity intermittent rowing. Canadian Journal of Applied Physiology 1996; 21(3): 197-208.
• Hahn A, Bourdon P. Protocols for the physiological assessment of rowers. Australian Sports Comission 1995; Section 3.
• Ingham SA, Carter H, Whyte GP, Doust JH. Comparison of the oxygen uptake kinetics of club and olympic champion rowers. Medicine and science in Sports and Exercise 2007; 39(5): 865-871.
• Jensen, K (1994). Rowing test methods. FISA coach 1994; 5(4): 11-19.
• Klusiewicz A. Relationship between the anaerobic threshold and the maximal lactate steady state in male and female rowers. Biology of sport 2005; 22(2): 171-179.
• Koutedakis Y. The role of physiological assessment in team selection with special reference to rowing. British Journal of Sports Medicine 1989; 23(1): 51-52.
• Lormes W, Buckwitz R, Rehbein H, Steinacker JM. Performance and blood lactate on Gjessing and Concept II rowing ergometers. International Journal of Sports Medicine 1993; 14(Suppl 1): 29-31.
• Messonier L, Freund H, Bourdin M, Belli A, Lacour J. Lactate exchange and removal abilities in rowing performance. Medicine and Science in Sports and Exercise 1997; 29(3): 396-401.
• Nolte V. Rowing faster. Human Kinetics: USA; 2006.
• Roels B, Schmitt L, Libicz S, Bentley D, Richalet JP, Millet G. Specificity of VO2Max and the ventilatory threshold in free swimming and cycle ergometry: comparison between triathletes and swimmers. British Journal of Sports Medicine 2005; 39: 965-968.
• Roth W, Shwantitz P, Bauer P. Force time characteristics of the rowing stroke and corresponding physiological muscle adaptations. International Journal of Sports Medicine 1993; 14(Suppl 1): 23-34.
• Steinacker JM. Physiological aspects of training in rowing. International Journal of Sports Medicine 1993; 14(Suppl 1): 3-10.
• Steinacker JM, Lormes W, Lehmann M, Altenburg D. Training of Rowers before World Championships. Medicine and Science in Sports and Exercise 1998; 30(7): 1158-1163.
• Urhausen A,Weiler B, Kindermann W. Heart rate, blood lactate and catecholamines during ergometer and on water rowing. International Journal of Sports Medicine 1993; 14(Suppl 1): 20-23.