Nutrition and energetics of exercise at altitude. Theory and possible practical implications.

Détails

ID Serval
serval:BIB_EE1F89387849
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Titre
Nutrition and energetics of exercise at altitude. Theory and possible practical implications.
Périodique
Sports Medicine
Auteur⸱e⸱s
Kayser B.
ISSN
0112-1642 (Print)
ISSN-L
0112-1642
Statut éditorial
Publié
Date de publication
1994
Volume
17
Numéro
5
Pages
309-323
Langue
anglais
Résumé
Altitude exposure may lead to considerable weight loss. Most reports, showing weight losses of 3% in 8 days at 4300m and up to 15% after 3 months at 5300 to 8000m, appear to indicate that this weight loss is a function of both absolute altitude and the duration of exposure. Based on the available scientific evidence to date, it is concluded that altitude weight loss is because of an initial loss of water and subsequent loss of fat and muscle mass due to malnutrition. Up to 5500m, malabsorption of macronutrients does not occur. Up to altitudes around 5000m, weight loss from a reduction of fat and muscle appears to be avoidable by maintaining adequate dietary intake. Primary anorexia, lack of comfort and palatable food, detraining, and possibly direct effects of hypoxia on protein metabolism seem inevitably to lead to weight loss during longer exposures at higher altitudes. To minimise losses, it is advisable to acclimatise properly, reduce the length of stay at extreme altitude as much as possible and maintain a high and varied nutrient intake. With sojourns at intermediate altitude for training purposes, adequate energy intake should be maintained taking into account the decrease in aerobic training intensity and the increase in basal metabolic rate that ensue from the hypoxic environment.
Mots-clé
Altitude, Body Water/metabolism, Energy Metabolism/physiology, Exercise/physiology, Humans, Malabsorption Syndromes/etiology, Muscles/metabolism, Muscles/physiology, Nutritional Physiological Phenomena/physiology, Proteins/metabolism, Sports/physiology, Weight Loss
Pubmed
Web of science
Création de la notice
19/09/2013 11:19
Dernière modification de la notice
20/08/2019 17:15
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