Document Detail


Cardio-pulmonary function of cyclists competing on an ascending mountain course between altitudes of 1400 m and 2800 m.
MedLine Citation:
PMID:  7698854     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Physiological changes were investigated in the cardio-respiratory function of competitors in a bicycle race which involved not a flat course but ascending a mountain, from 1400 m to 2800 m. Heart rate throughout the race, arterial oxygen saturation and pulmonary function before and after the race of well trained competitors were measured. The individual's maximal heart rate during the race was designated as HRmax for the calculations. (1) There were significant correlations between the age and the mean %HRmax during the race, between mean %HRmax and time, and between age and time (n = 15); the mean %HRmax had a 3.90 times greater effect on time than did age. (2) The individuals who performed best had lower values of oxygen saturation just after finishing the race (n = 51). (3) At 1 min after reaching the finishing line, oxygen saturation levels had recovered to the value of 20 min after finishing the race, whereas the heart rate was still in the process of recovery (n = 18). (4) Maximum expiratory flow at 50% vital capacity measured 30 min after reaching the finishing line was significantly higher than at the starting point. The intensity of the load on the cardiac system produced by completion of this course was estimated to be almost the same as that of a full marathon on a flat course. The time depended on both the youth of the cyclist and on his ability to maintain a high value of %HRmax during the race.
Authors:
M Takeoka; T Fujiwara; A Sakai; Y Yanagidaira; M Kaneko; H Osada; O Kashimura; K Asano; K Matsumoto; G Ueda
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of biometeorology     Volume:  38     ISSN:  0020-7128     ISO Abbreviation:  Int J Biometeorol     Publication Date:  1995 Jan 
Date Detail:
Created Date:  1995-04-28     Completed Date:  1995-04-28     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0374716     Medline TA:  Int J Biometeorol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  102-7     Citation Subset:  IM    
Affiliation:
Department of Environmental Physiology, Shinshu University School of Medicine, Matsumoto, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Age Factors
Altitude*
Bicycling
Cardiovascular Physiological Phenomena*
Heart Rate
Humans
Male
Oxygen / blood
Respiratory Physiological Phenomena*
Chemical
Reg. No./Substance:
7782-44-7/Oxygen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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