Energy expenditure before and during energy restriction in obese patients.

Détails

ID Serval
serval:BIB_507BF65A39C4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Energy expenditure before and during energy restriction in obese patients.
Périodique
American Journal of Clinical Nutrition
Auteur(s)
Ravussin E., Burnand B., Schutz Y., Jéquier E.
ISSN
0002-9165 (Print)
ISSN-L
0002-9165
Statut éditorial
Publié
Date de publication
1985
Peer-reviewed
Oui
Volume
41
Numéro
4
Pages
753-759
Langue
anglais
Résumé
Twenty-four hour energy expenditure (24 EE), resting metabolic rate (RMR), spontaneous physical activity and body composition were determined in 7 obese patients (5 females, 2 males, 174 +/- 9% IBW, 38 +/- 2% fat mass) on 2 different occasions: before weight reduction, and after 10 to 16 weeks on a hypocaloric diet as outpatients, the recommended energy intake varying from 3500 to 4700 kJ/day depending on the subject. Mean body weight loss was 12.6 +/- 1.9 kg, ie 13% of initial body weight, 72% being fat. Twenty-four hour energy expenditure (24 EE) was measured in a respiration chamber with all the subjects receiving 10418 kJ/d before weight reduction and an average of 3360 +/- 205 kJ/d while on the diet. When expressed in absolute values, both 24 EE and RMR decreased during the hypocaloric diet from 9819 +/- 442 to 8229 +/- 444 and from 7262 +/- 583 to 6591 +/- 547 kJ/d respectively. On the basis of fat-free-mass (FFM), 24 EE decreased from 168 +/- 6 to 148 +/- 5 kJ/kg FFM/d whereas RMR was unchanged (approximately 120 kJ/kg FFM/d). Approximately one half of the 24 EE reduction (1590 kJ/d) was accounted for by a decrease in RMR, the latter being mainly accounted for by a reduction in FFM. Most of the remaining decline in 24 EE can be explained by a decreased thermic effect of food, and by the reduced cost of physical activity mainly due to a lower body weight. Therefore, there seems little reason to evoke additional mechanisms to explain the decline in energy expenditure during dieting.
Mots-clé
Adult, Basal Metabolism, Body Composition, Body Weight, Diet, Reducing, Energy Metabolism, Female, Humans, Male, Middle Aged, Obesity/blood, Obesity/diet therapy, Oxygen Consumption, Physical Exertion
Pubmed
Web of science
Création de la notice
21/01/2008 14:08
Dernière modification de la notice
03/03/2018 17:09
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