ISSN: 1300-0292
İndekslendiği Dizinler: SCIENCE CITATION INDEX EXPANDED
CINAHL, Index Copernicus,
Chemical Abstracts (CA),
Excerpta Medica / EMBASE
Dil: Türkçe, İngilizce
İçerik: Orijinal Araştırma, Derleme, Editöre Mektup, Olgu Sunumu, Tıp Eğitimi, Tıbbi Kitap İncelemeleri
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ORIGINAL RESEARCH ARTICLES |
Effects Of Increased Airway Resistance On Aerobicand Anaerobic Capacity During Exercise
Oğuz ÖZÇELİK*, Ramiz ÇOLAK**
* Yrd.Doç.Dr., Fırat Üniversitesi Tıp Fakültesi Fizyoloji AD,
Introduction: Cardiopulmonary function tests have been used to measure functional capacity of the subjects. The anaerobic threshold (qan) which describes the onset of systematic increase in blood lactate concentration is an important parameter for reflecting subjects oxidative stress and widely used to distinguish aerobic and anaerobic capacity.
Purpose: We aimed to establish the effects of increased respiratory resistance which constrain ventilation on aerobic and anaerobic capacity.
Methods: Eight male subjects performed three incremental exercise tests on different days using a cycle ergometery; control (C), 10 mm (R1) and 8 mm (R2) bore diameter resistors. Exercise test protocol started with 20 W cycling as a warm-up period, then the work rate was increased 15 W/min to the limit of tolerance. Ventilatory and pulmonary gas exchange parameters were measured using turbine volume meter and mass spectrometry and processed breath-by-breath. qan estimated non-invasively using V-slope method.
Results: Increased respiratory resistance led to systematic decreases both in maximal ventilation [100.1±13.6 l/min (C), 78.0±5.7 l/min (R1), 57.5±5.0 l/min (R2)] and exercise performance [255±30 W/min (C) 241±17 W/min (R1) and 233±14 W/min (R2)]. However, there was no statistically differences in qan: 1.79±0.29 l/min (C), 1.81±0.28 l/min (R1) and 1.76±0.17 l/min (R2).
Conclusion: The results of the present study shows that acute increase in respiratory resistance has no effect on aerobic capacity in normal subjects which is an important health criteria despite the reduction in maximal capacity.Keywords: Exercise tests, Anaerobic threshold,
Respiratory resistanceTurkiye Klinikleri J Med Sci 2001, 21:455-458
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