Current recommendations for energy requirements in the elderly are based on assumed levels of physical activity relative to BMR (1.5 x BMR).
The main aim of the present study was to establish whether these recommendations might be applicable to a randomly-selected group of free-living elderly men (all over 75 years of age).
BMR was measured by indirect calorimetry and total energy expenditure (TEE) by the doubly-labelled-water technique.
Further aims included evaluating the applicability of a variety of BMR prediction equations and whether assessed quality of life reflected any measured indices of energy expenditure.
The mean value for daily energy requirement was found to be 1.5 x BMR (89 J/kg per min) but with substantial inter-individual variation (SD 0.2 x BMR ; 14 J/kg per min).
The bias between measured TEE and TEE estimated (1.5 x BMR) from the various BMR predictions varied according to which equation was used (-10-8% of the mean) with substantial 95% limits of agreement (28-30% of the mean).
TEE and physical activity plus thermogenesis (TEE-BMR) were positively related to activities of daily living, but no relationships were apparent between these and perceived quality of life.
It is concluded that, despite considerable inter-individual variability, national recommendations for energy requirements of elderly people are applicable to this randomly-selected group of free-living men over 75 years of age but that substantial variation exists when atte...
Mots-clés Pascal : Royaume Uni, Europe, Vieillard, Homme, Mâle, Dépense énergétique, Métabolisme de base, Recommandation alimentaire, Besoin nutritif, Bilan énergétique, Métabolisme énergétique, Santé publique
Mots-clés Pascal anglais : United Kingdom, Europe, Elderly, Human, Male, Energetic cost, Basal metabolism, Dietary allowance, Nutrient requirement, Energy balance, Energy metabolism
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0174835
Code Inist : 002B29B. Création : 199608.