Energy expenditure climbing Mt. Everest.

Détails

ID Serval
serval:BIB_0C154872AA4F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Energy expenditure climbing Mt. Everest.
Périodique
Journal of Applied Physiology
Auteur(s)
Westerterp K.R., Kayser B., Brouns F., Herry J.P., Saris W.H.
ISSN
8750-7587 (Print)
ISSN-L
0161-7567
Statut éditorial
Publié
Date de publication
1992
Volume
73
Numéro
5
Pages
1815-1819
Langue
anglais
Résumé
Weight loss is a well-known phenomenon at high altitude. It is not clear whether the negative energy balance is due to anorexia only or an increased energy expenditure as well. The objective of this study was to gain insight into this matter by measuring simultaneously energy intake, energy expenditure, and body composition during an expedition to Mt. Everest. Subjects were two women and three men between 31 and 42 yr of age. Two subjects were observed during preparation at high altitude, including a 4-day stay in the Alps (4,260 m), and subsequently during four daytime stays in a hypobaric chamber (5,600-7,000 m). Observations at high altitude on Mt. Everest covered a 7- to 10-day interval just before the summit was reached in three subjects and included the summit (8,872 m) in a fourth. Energy intake (EI) was measured with a dietary record, average daily metabolic rate (ADMR) with doubly labeled water, and resting metabolic rate (RMR) with respiratory gas analysis. Body composition was measured before and after the interval from body mass, skinfold thickness, and total body water. Subjects were in negative energy balance (-5.7 +/- 1.9 MJ/day) in both situations, during the preparation in the Alps and on Mt. Everest. The loss of fat mass over the observation intervals was 1.4 +/- 0.7 kg, on average two-thirds of the weight loss (2.2 +/- 1.5 kg), and was significantly correlated with the energy deficit (r = 0.84, P < 0.05). EI on Mt. Everest was 9-13% lower than during the preparation in the Alps.(ABSTRACT TRUNCATED AT 250 WORDS)
Mots-clé
Adult, Body Composition/physiology, Body Water/metabolism, Diet, Energy Metabolism/physiology, Female, Humans, Male, Mountaineering
Pubmed
Web of science
Création de la notice
19/09/2013 10:30
Dernière modification de la notice
20/08/2019 12:33
Données d'usage