Does intermittent hypoxia increase erythropoiesis in professional cyclists during a 3-week race?
In this study we examined the effects of intermittent hypoxia exposure (IHE) in a group of professional cyclists (n = 6; age 26 +/- 1 yr) competing in the 2001 Vuelta a España. After each daily stage, treated subjects received four 5-min bouts of normobaric IHE (mean O2 concentration of 12.6%, simul...
| Authors: | , , , , , |
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| Format: | article |
| Publication Date: | 2005 |
| Country: | España |
| Institution: | Universidad Europea (UEM) |
| Repository: | ABACUS. Repositorio de Producción Científica |
| Language: | English |
| OAI Identifier: | oai:abacus.universidadeuropea.com:11268/5519 |
| Online Access: | http://hdl.handle.net/11268/5519 |
| Access Level: | Open access |
| Keyword: | Ciclismo - Aspectos fisiológicos Medicina deportiva - Ciclismo Medicina deportiva |
| Summary: | In this study we examined the effects of intermittent hypoxia exposure (IHE) in a group of professional cyclists (n = 6; age 26 +/- 1 yr) competing in the 2001 Vuelta a España. After each daily stage, treated subjects received four 5-min bouts of normobaric IHE (mean O2 concentration of 12.6%, simulating a mean altitude of 4,000 m) interspersed with 5-min bouts of breathing hotel room air (normoxia) until completing a total IHE of 20-min duration. The primary outcome, compared to a control group of similar characteristics not receiving IHE (n = 5; age 25 +/- 1 yr), was the % increase in erythropoietin (Epo) from the beginning to the end of the Vuelta. Statistical analysis showed that Epo increase tended to be higher (p = 0.052) in the IHE group than in controls (37.4 +/- 5.8% vs. -4.4 +/- 19.5%, respectively). However IHE had no effect on reticulocytes or erythrocyte count (p > 0.05). |
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