Acclimatization to altitude and normoxic training improve 400-m running performance at sea level
Deutscher übersetzter Titel: | Hoehenakklimatisation plus Training in Normoxie verbessern die 400-m-Laufleistung auf Meeresniveau |
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Autor: | Nummela, A.; Rusko, H. |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 18 (2000), 6, S. 411-419, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199912408043 |
Quelle: | BISp |
Abstract des Autors
To investigate the benefits of 'living high and training low' on anaerobic performance at sea level, eight 400-m runners lived for 10 days in normobaric hypoxia in an altitude house (oxygen content= 15.8%) and trained outdoors in ambient normoxia at sea level. A maximal anaerobic running test and 400-m race were performed before and within 1 week of living in the altitude house to determine the maximum speed and the speeds at different submaximal blood lactate concentrations (3, 5, 7, 10 and 13 mmol/I) and 400-m race time. At the same time, ten 400-m runners lived and trained at sea level and were subjected to identical test procedures. Multivariate analysis of variance indicated that the altitude house group but not the sea-level group improved their 400-m race time during the experimental period (P<0.05). The speeds at blood lactate concentrations of 5-13 mmol/I tended to increase in the altitude house group but the response was significant only at 5 and 7 mmol/I (P<0.05). Furthermore, resting blood pH was increased in six of the eight altitude house athletes from 0.003 to 0.067 pH unit (P<0.05). The results of this study demonstrate improved 400-m performance after 10 days of living in normobaric hypoxia and training at sea level. Furthermore, the present study provides evidence that changes in the acid-base balance and lactate metabolism might be responsible for the improvement in sprint performance. Verf.-Referat