Impaired interval exercise responses in elite female cyclists at moderate simulated altitude
Deutscher übersetzter Titel: | Verschlechterte Reaktionen auf Intervallbelastung bei Spitzen-Radsportlerinnen in mittlerer simulierter Hoehe |
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Autor: | Brosnan, M.J.; Martin, D.T.; Hahn, A.G.; Gore, C.J.; Hawley, J.A. |
Erschienen in: | Journal of applied physiology |
Veröffentlicht: | 89 (2000), 5, S. 1819-1824, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 8750-7587, 0021-8987, 0161-7567, 1522-1601 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU199912409785 |
Quelle: | BISp |
Abstract des Autors
The effect of hypoxia on the response to interval exercise was determined in eight elite female cyclists during two interval sessions: a sustained 3x10-min endurance set (5-min recovery) and a repeat sprint session comprising three sets of 6x15-s sprints (work-to-relief ratios were 1:3, 1:2, and 1:1 for the 1st, 2nd, and 3rd sets, respectively, with 3 min between each set). During exercise, cyclists selected their maximum power output and breathed either atmospheric air (normoxia, 20.93% O2) or a hypoxic gas mix (hypoxia, 17.42% O2). Power output was lower in hypoxia vs. normoxia throughout the endurance set (244+/-18 vs. 226+/-17, 234+/-18 vs. 221+/-25, and 235+/-18 vs. 221+/-25 W for 1st, 2nd, and 3rd sets, respectively; P<0.05) but was lower only in the latter stages of the second and third sets of the sprints (452+/-56 vs. 429+/-49 and 403+/-54 vs. 373+/-43 W, respectively; P<0.05). Hypoxia lowered blood O2 saturation during the endurance set (92.9+/-2.9 vs. 95.4+/-1.5%; P<0.05) but not during repeat sprints. We conclude that, when elite cyclists select their maximum exercise intensity, both sustained (10 min) and short-term (15 s) power are impaired during hypoxia, which simulated moderate (ca. 2,100 m) altitude. Verf.-Referat