title: [Obesity in old age and its importance for functionality and frailty].
abstract: In later life a high body mass index (BMI) is associated with the lowest age-related mortality rate. The BMI range used by the World Health Organization (WHO) to classify overweight, a BMI of 25-30 kg/m2, can be regarded as normal weight in old age; nevertheless, obesity is associated with an increased risk of disability and of a deterioration in physical functionality, particularly among older age groups. This relationship to obesity has also been established for frailty. For this reason, a reduction in weight may be appropriate under functional aspects if BMI values exceed 30 kg/m2; however, such a decision cannot be made on the basis of an individual BMI alone. The functional status, body composition, comorbidities and, in particular the life perspectives of the patient should also be taken into consideration. If weight loss is intended, it must always be performed under strict medical supervision involving optimized protein intake, a carefully calculated moderate reduction in calories and adequate physical training. In the case of chronically ill elderly patients, weight reduction is not usually appropriate. Restrictive diets of any kind should principally be critically viewed in old age because even temporary inadequate energy intake may lead to accelerated deterioration of muscle and bone structure.
authors.affiliation: Universitätsklinik für Geriatrie, Klinikum Oldenburg, Carl von Ossietzky Universität, Rahel-Straus-Straße 10, Oldenburg, 26133, Deutschland. julia.wojzischke@uni-oldenburg.de.
authors.forename: Julia
authors.identifier: http://orcid.org/0000-0003-1241-3470
authors.initials: J
authors.lastname: Wojzischke
authors.affiliation: Universitätsklinik für Geriatrie, Klinikum Oldenburg, Carl von Ossietzky Universität, Rahel-Straus-Straße 10, Oldenburg, 26133, Deutschland.
authors.forename: Rebecca
authors.initials: R
authors.lastname: Diekmann
authors.affiliation: Lehrstuhl für Geriatrie, Ruprecht Karls Universität Heidelberg, Agaplesion Bethanien Krankenhaus Heidelberg, Heidelberg, Deutschland.
authors.forename: Jürgen M
authors.initials: JM
authors.lastname: Bauer
mesh_terms: D000203:Activities of Daily Living; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D004035:Diet Therapy / Q000706:statistics & numerical data*; D005081:Exercise Therapy / Q000706:statistics & numerical data*; D005260:Female; D016330:Frail Elderly / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D009765:Obesity / Q000401:mortality* / Q000517:prevention & control*; D015995:Prevalence; D012307:Risk Factors; D057185:Sedentary Behavior; D015996:Survival Rate; D016896:Treatment Outcome
keywords: Aging; Body mass index; Mortality; Overweight; Physical function