Erythropoiesis and performance after two weeks of living high and training low in well trained triathletes

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Deutscher übersetzter Titel:Erythropoese und Leistung nach 2 Wochen mit dem Konzept "Leben in der Höhe - Trainieren in der Niederung" bei durchtrainierten Triathleten
Autor:Dehnert, C.; Hütler, M.; Liu, Y.; Menold, E.; Netzer, C.; Schick, R.; Kubanek, B.; Lehmann, M.; Böning, Dieter; Steinacker, Jürgen Michael
Erschienen in:International journal of sports medicine
Veröffentlicht:23 (2002), 8, S. 561-566, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Englisch
ISSN:0172-4622, 1439-3964
DOI:10.1055/s-2002-35533
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Erfassungsnummer:PU200407001950
Quelle:BISp

Abstract

The purpose of our study was to evaluate hematologic acclimatization during 2 weeks of intensive normoxic training with regeneration at moderate altitude (living high-training low, LHTL) and its effects on sea-level performance in well trained athletes compared to another group of equally trained athletes under control conditions (living low - training low, CONTROL). Twenty-one triathletes were ascribed either to LHTL (n=11; age: 23.0 ± 4.3 yrs; VO2max: 62.5 ± 9.7 [ml/min/kg]) living at 1956 m of altitude or to CONTROL (n=10; age: 18.7 ± 5.6 yrs; VO2max: 60.5 ± 6.7 ml/min/kg) living at 800 m. Both groups perfomed an equal training schedule at 800 m. VO2max, endurance performance, erythropoietin in serum, hemoglobin mass (Hbtot, CO-rebreathing method) and hematological quantities were measured. A tendency to improved performance in LHTL after the camp was not significant (p<0.07). Erythropoietin concentration increased temporarily in LHTL (delta 14.3 ± 8.7 mU/ml; p<0.012). Hbtot remained unchanged in LHTL whereas was slightly decreased from 12.5 ± 1.3 to 11.9 ± 1.3 g/kg in CONTROL (p<0.01). As the reticulocyte number tended to higher values in LHTL than in CONTROL, it seems that a moderate stimulation of erythropoiesis during regeneration at altitude served as a compensation for an exercise-induced destruction of red cells. Verf.-Referat