Influence of "living high-training low" on aerobic performance and economy of work in elite athletes

Détails

ID Serval
serval:BIB_B1ED2BA62638
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Influence of "living high-training low" on aerobic performance and economy of work in elite athletes
Périodique
European Journal of Applied Physiology
Auteur⸱e⸱s
Schmitt L., Millet G., Robach P., Nicolet G., Brugniaux J.V., Fouillot J.P., Richalet J.P.
ISSN
1439-6319
Statut éditorial
Publié
Date de publication
07/2006
Peer-reviewed
Oui
Volume
97
Numéro
5
Pages
627-636
Langue
anglais
Notes
Publication types: Clinical Trial ; Journal Article
Résumé
This study tested the effects of "living high-training low" (Hi-Lo) on aerobic performance and economy of work in elite athletes. Forty endurance athletes (cross-country skiers, swimmers, runners) performed 13-18 consecutive days of training at 1,200 m altitude, by sleeping at 1,200 m (LL, n = 20) or in hypoxic rooms with 5-6 nights at 2,500 m followed by 8-12 nights at 3,000-3,500 m (HL, n = 20). The athletes were evaluated before (pre-), one (post-1) and 15 days (post-15) after Hi-Lo. Economy was assessed from two sub-maximal tests, one non-specific (cycling) and one specific (running or swimming). From pre- to post-1: V(O2)max increased both in HL (+ 7.8%, P < 0.01) and in LL (+ 3.3%, P < 0.05), peak power output (PPO) tended to increase more (P=0.06) in HL (+ 4.1%, P < 0.01) than in LL (+ 1.9%). At post-15, V(O2)max has returned to pre-values in both groups, PPO increased more (P < 0.05) in HL (+ 8.3%, P < 0.01) than in LL (+ 3.8%), V(O2) and power at respiratory compensation point (RCP) increased more (P < 0.05) in HL (+ 9.5%, P < 0.01 and + 11.2%, P < 0.01) than in LL (+ 3.2 and + 3.3%). Cycling mechanical efficiency (8-5%) and economy during specific locomotion (7-7%) increased (P < 0.05) in both groups. This study shows that, for a similar increase in V(O2)max HL had a greater increase in PPO than LL. The efficiency of Hi-Lo is also evidenced 15 days later by higher V(O2) and power at RCP. This study emphasizes that during the post-altitude period, economy of work greatly increases in both groups.
Mots-clé
Acclimatization/physiology, Altitude, Anoxia/physiopathology, Energy Metabolism/physiology, Exercise/physiology, Female, Humans, Male, Oxygen Consumption/physiology, Physical Endurance/physiology, Physical Exertion/physiology, Physical Fitness/physiology, Respiratory Physiological Phenomena, Sports/physiology
Pubmed
Création de la notice
25/09/2008 9:01
Dernière modification de la notice
20/08/2019 16:20
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