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DEĞİŞİK PEDAL HIZLARI VE ÇALIŞMA YÜKLERİNİN FİZYOLOJİK PARAMETRELER VE MEKANİK VERİMLİLİK ÜZERİNE ETKİSİ

Journal Name:

  • Hacettepe Üniversitesi Spor Bilimleri Dergisi

Publication Year:

  • 1996

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
The purpose of this study was to determine the effects of different pedal rate (40, 50, 60, &90 rpm) and work load (75, 125, 175 & 225 watt) on physiological parameters and mechanical efficiency. For this purpose, 19 male (mean age=22.73±2.48) Scool of Sport Science and Technology students were selected as a subject. Subjects participated to progressive aerobic exercise on bicycle ergometer at different pedal rate (40, 50, 60 &90 rpm). Initial work load was 75 watt for all pedal rate and then it was increased by 50 watt for each three minutes. Heart rate (HR), Oxygen cunsumption (V02), pulmonary ventilation (VE), ventilatory efficiency (VE/V02) and oxygen pulse (V02/HR) were continiously determined by Benchmark Breath-by Breath Exercise Test during exercise. In addition to that, mechanical efficiency (ME) was calculated from V02. There were significant differences on V02, VE, VV and ME at all work load among pedal rates. Although there was a significant difference in HR on 75, 125, 175 w work loads among pedal rates (p<.05), there was no significant difference in HR among pedal rates on 225 w work load. In addition to that, significant difference was obtained in oxygen pulse among pedal rates on 125, 175 and 225 w work loads (p<.05), but not 75 w work load. Whereas, there were significant differences on HR, VE, VE/V02 V02/HR and ME at all pedal rates among the work loads (p<.05). It can be concluded that, physiological parameters and mechanical efficiency were effected by pedal rates and work loads. Teherefore ME was better determined by high work load (225 w) and low pedal rate (40 rpm) rather than high pedal rate (90 rpm) and low load (75 w).
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Abstract (Original Language): 
d/dk.) ve çalışma yüklerinin (75, 125, 175 ve 225 watt) fizyolojik parametreler (kalp atım hızı, oksijen tüketimi, pulmonar ventilas-yon, ventilatuar verimlilik) ve mekanik verimlilik (MV) üzerine etkisinin belirlenmesidir. Bu amaçla yaş ortalamaları 22.73±2.48 olan 19 Spor Bilimleri ve Teknolojisi öğrencisi denek olarak kullanılmıştır. Denekler Bisiklet ergometresinde 40, 50, 60 ve 90 d/dk pedal hızlarında arttırmalı aerobik egzersize katılmışlardır. Egzersiz sırasında kalp atım hızı (KAH), oksijen tüketimi (VÛ2), pulmonar ventilasyon (VE) ve ventilatuar verimlilik (VV) Bench¬mark Breath - by - Breath Exercise Test aracından her nefeste devamlı olarak izlenmiştir. Oksijen nabzı ve mekanik verimlilik (MV) tüketilen oksijen yola çıkılarak hesaplanmıştır. Tüm çalışma yüklerinde V02 VE, VV, ve MV'nin pedal hızları arasında anlamlı farklılık gösterdiği bulunmuştur (p<.05). Buna ek olarak, oksijen nabzının 125, 175 ve 225 w çalışma yüklerin-deki pedal hızları arasında anlamlı farklılık gösterdiği bulunurken (p<.05), 75 w çalışma yükünde anlamlı farklılık bulunamamıştır. Buna karşılık, KAH, V02, VV, oksijen nabzı ve MV, tüm pedal hızlarındaki çalışma yükleri arasında anlamlı bir farklılık göstermiştir (p<.05). En verimli pedal hızının 40 d/dk ve en verimli çalışma yükünün de 225 w çalışma yükü olduğu bulunmuştur. Sonuç olarak, fizyolojik parametreler ve mekanik verimlilik, pedal hızı ve çalışma yükü ile etkilenmektedir. Dolayısıyla mekanik verimlilik, düşük pedal hızı (40 d/dk) yüksek çalışma yükünün (225 w); yüksek pedal hızı (90 d/dk) düşük çalışma yüküne (75 w) oranla en verimli şekilde belirlenebilmektedir.
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