Document Detail


Time course of haemoglobin mass during 21 days live high:train low simulated altitude.
MedLine Citation:
PMID:  19294411     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of this study was to determine the time course of changes in haemoglobin mass (Hb(mass)) in well-trained cyclists in response to live high:train low (LHTL). Twelve well-trained male cyclists participated in a 3-week LHTL protocol comprising 3,000 m simulated altitude for ~14 h/day. Prior to LHTL duplicate baseline measurements were made of Hb(mass), maximal oxygen consumption (VO(2max)) and serum erythropoietin (sEPO). Hb(mass) was measured weekly during LHTL and twice in the week thereafter. There was a 3.3% increase in Hb(mass) and no change in VO(2max) after LHTL. The mean Hb(mass) increased at a rate of ~1% per week and this was maintained in the week after cessation of LHTL. The sEPO concentration peaked after two nights of LHTL but there was only a trivial correlation (r = 0.04, P = 0.89) between the increase in sEPO and the increase in Hb(mass). Athletes seeking to gain erythropoietic benefits from moderate altitude need to spend >12 h/day in hypoxia.
Authors:
Sally A Clark; M J Quod; M A Clark; D T Martin; P U Saunders; C J Gore
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-03-18
Journal Detail:
Title:  European journal of applied physiology     Volume:  106     ISSN:  1439-6327     ISO Abbreviation:  Eur. J. Appl. Physiol.     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-06-01     Completed Date:  2009-09-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100954790     Medline TA:  Eur J Appl Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  399-406     Citation Subset:  IM    
Affiliation:
Department of Physiology, Australian Institute of Sport, PO Box 176, Belconnen, ACT, 2616, Australia. sally.clark@ausport.gov.au
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Altitude*
Anoxia / physiopathology
Bicycling / physiology*
Erythropoiesis / physiology*
Exercise / physiology*
Hemoglobins / metabolism*
Humans
Male
Oxygen / metabolism*
Oxygen Consumption
Physical Fitness / physiology
Time Factors
Young Adult
Chemical
Reg. No./Substance:
0/Hemoglobins; 7782-44-7/Oxygen

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


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