Effects of endurance training on the isocapnic buffering and hypocapnic hyperventilation phases in professional cyclists

Objectives—To evaluate the changes produced in both the isocapnic buffering and hypocapnic hyperventilation (HHV) phases of professional cyclists (n = 11) in response to endurance training, and to compare the results with those of amateur cyclists (n = 11). Methods—Each professional cyclist performe...

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Bibliographic Details
Published in:British journal of sports medicine 2000-12, Vol.34 (6), p.450-455
Main Authors: Chicharro, José L, Hoyos, Jesús, Lucía, Alejandro
Format: Article
Language:English
Subjects:
Adult
Bicycling - physiology
Compensation
cycling
Exercise
Exercise Test
Heart rate
Humans
Hypocapnia - physiopathology
hypocapnic hyperventilation
isocapnic buffering
Male
Metabolism
Original
Physical Endurance - physiology
Physical fitness
Physiology
Respiration
Studies
training
Workloads
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Summary:Objectives—To evaluate the changes produced in both the isocapnic buffering and hypocapnic hyperventilation (HHV) phases of professional cyclists (n = 11) in response to endurance training, and to compare the results with those of amateur cyclists (n = 11). Methods—Each professional cyclist performed three laboratory exercise tests to exhaustion during the active rest (autumn: November), precompetition (winter: January), and competition (spring: May) periods of the sports season. Amateur cyclists only performed one exercise test during the competition period. The isocapnic buffering and HHV ranges were calculated during each test and defined as Vo2 and power output (W). Results—No significant differences were found in the isocapnic buffering range in each of the periods of the sports season in professional cyclists. In contrast, there was a significant reduction in the HHV range (expressed in W) during both the competition (p
ISSN:0306-3674
1473-0480
DOI:10.1136/bjsm.34.6.450