Timing the arrival at 2340 m altitude for aerobic performance.
Scand J Med Sci Sports
; 17(5): 588-94, 2007 Oct.
Article
en En
| MEDLINE
| ID: mdl-17316377
ABSTRACT
This study tested the hypothesis that maximal oxygen uptake (VO(2max)) and performance increase upon altitude acclimatization at moderate altitude. Eight elite cyclists were studied at sea level, and after 1 (Day 1), 7 (Day 7), 14 (Day 14) and 21 (Day 21) days of exposure to 2340 m. Capillary blood samples were taken on these days before performing two consecutive maximal exercise trials. Acclimatization increased hemoglobin concentration and arterial oxygen content. On Day 1, VO(2max) and time to exhaustion (at 80% of sea-level maximal power output) decreased by 12.8% (P<0.05) and 25.8% (P<0.05), respectively, compared with the corresponding sea-level values. Subsequently, these parameters increased by 3.2% (P<0.05) and 6.0% (P<0.05) from Days 1 to 7, by 4.8% (P<0.05) and 5.7% (P<0.05) from Days 7 to 14, followed by 0.7% (P>0.05) and 1.4% (P>0.05) from Days 14 to 21, respectively. These data suggest that endurance athletes competing at altitudes around 2340 m should expose themselves to this altitude at least 14 days before competition.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Resistencia Física
/
Ciclismo
/
Hemoglobinas
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Ejercicio Físico
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Músculo Esquelético
/
Altitud
/
Contracción Muscular
Tipo de estudio:
Observational_studies
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
Scand J Med Sci Sports
Asunto de la revista:
MEDICINA ESPORTIVA
Año:
2007
Tipo del documento:
Article
País de afiliación:
Suiza