Dietary Protein Intake in Elderly Women: Association With Muscle and Bone Mass

Dietary Protein Intake in Elderly Women: Association With Muscle and Bone Mass

Author Genaro, Patricia de Souza Google Scholar
Pinheiro, Marcelo de Medeiros Autor UNIFESP Google Scholar
Szejnfeld, Vera Lucia Autor UNIFESP Google Scholar
Martini, Ligia Araujo Google Scholar
Institution Universidade de São Paulo (USP)
Universidade Federal de São Paulo (UNIFESP)
Abstract Background: An inadequate food intake, mainly with regard to protein intake, seems to contribute to a reduction of skeletal muscle and bone mass in the elderly. This study was undertaken to evaluate differences in protein intake in women with or without sarcopenia and verify the intake level that is related to a better bone and muscle mass. Methods: Elderly women older than 65 years with sarcopenia (n = 35) and without sarcopenia (n = 165) participated in the study. Assessment of bone mineral density of the lumbar spine and femur was taken, body composition was evaluated by dual-energy x-ray absorptiometry, and an evaluation of protein intake was performed through 3-day dietary records. Results: Muscle, bone, and fat mass was significantly higher in women who had protein intake > 1.2 g/kg/d. A lower intake of essential amino acids in women with sarcopenia was also observed. Protein and energy intake were significant predictors of muscle mass. the presence of osteoporosis was a predictor of muscle strength. in conclusion, the present study demonstrated that in elderly women, an adequate protein intake in terms of quality and quantity, without need of supplementation, could have a positive impact on bone mineral density, lean mass, and skeletal muscle mass.
Keywords dietary proteins
aged
protein intake
elderly
sarcopenia
essential amino acids
osteoporosis
body composition
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number FAPESP: 03/06238-7
FAPESP: 03/10314-0
CNPq: 470862/2009-2
Date 2015-04-01
Published in Nutrition in Clinical Practice. Thousand Oaks: Sage Publications Inc, v. 30, n. 2, p. 283-289, 2015.
ISSN 0884-5336 (Sherpa/Romeo, impact factor)
Publisher Sage Publications Inc
Extent 283-289
Origin http://dx.doi.org/10.1177/0884533614545404
Access rights Closed access
Type Article
Web of Science ID WOS:000352487800015
URI http://repositorio.unifesp.br/handle/11600/38981

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