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Nutrients. 2018 Sep 19;10(9). pii: E1330. doi: 10.3390/nu10091330.

Relative Protein Intake and Physical Function in Older Adults: A Systematic Review and Meta-Analysis of Observational Studies.

Author information

1
Applied Kinesiology Laboratory⁻AKL, School of Physical Education, University of Campinas, Av. Érico Veríssimo, 701, Cidade Universitária "Zeferino Vaz", Barão Geraldo, Campinas-SP 13.083-851, Brazil. coelhojunior@hotmail.com.br.
2
Department of Geriatrics, Neurosciences and Orthopedics, Teaching Hospital "Agostino Gemelli", Catholic University of the Sacred Heart, 00168 Rome, Italy. coelhojunior@hotmail.com.br.
3
Applied Kinesiology Laboratory⁻AKL, School of Physical Education, University of Campinas, Av. Érico Veríssimo, 701, Cidade Universitária "Zeferino Vaz", Barão Geraldo, Campinas-SP 13.083-851, Brazil. teixeira.luisfelipe@gmail.com.
4
Applied Kinesiology Laboratory⁻AKL, School of Physical Education, University of Campinas, Av. Érico Veríssimo, 701, Cidade Universitária "Zeferino Vaz", Barão Geraldo, Campinas-SP 13.083-851, Brazil. prof.brodrigues@gmail.com.
5
School of Arts, Sciences and Humanities, University of São Paulo, Rua Arlindo Béttio, 1000-Ermelino Matarazzo, São Paulo-SP 03828-000, Brazil. reurybacurau@usp.br.
6
Department of Geriatrics, Neurosciences and Orthopedics, Teaching Hospital "Agostino Gemelli", Catholic University of the Sacred Heart, 00168 Rome, Italy. emarzetti@live.com.
7
Applied Kinesiology Laboratory⁻AKL, School of Physical Education, University of Campinas, Av. Érico Veríssimo, 701, Cidade Universitária "Zeferino Vaz", Barão Geraldo, Campinas-SP 13.083-851, Brazil. uchida@g.unicamp.br.

Abstract

(1) Background: The present work aims to conduct a systematic review and meta-analysis of observational studies, in order to investigate the association of relative protein intake and physical function in older adults; (2) Methods: Observational studies, that investigated the association between protein intake and physical function in older adults, were retrieved from MEDLINE, SCOPUS, CINAHL, AgeLine, EMBASE, and Cochrane-CENTRAL. Two independent researchers conducted study selection and data extraction; (3) Results: Very high protein intake (≥1.2 g/kg/day) and high protein intake (≥1.0 g/kg/day) groups showed better lower limb physical functioning and walking speed (WS) performance, respectively, in comparison to individuals who present relative low protein (<0.80 g/kg/day) intake. On the other hand, relative high protein intake does not seem to propitiate a better performance on isometric handgrip (IHG) and chair rise in comparison to relative low protein intake. In addition, there were no significant differences in the physical functioning of high and middle protein intake groups; (4) Conclusions: In conclusion, findings of the present study indicate that a very high (≥1.2 g/kg/day) and high protein intake (≥1.0 g/kg/day) are associated with better lower-limb physical performance, when compared to low protein (<0.80 g/kg/day) intake, in community-dwelling older adults. These findings act as additional evidence regarding the potential need to increase protein guidelines to above the current recommendations. However, large randomized clinical trials are needed to confirm the addictive effects of high-protein diets (≥1.0 g/kg/day) in comparison to the current recommendations on physical functioning. All data are available in the Open ScienceFramework.

KEYWORDS:

physical function; protein intake; sarcopenia

PMID:
30235845
PMCID:
PMC6163569
DOI:
10.3390/nu10091330
[Indexed for MEDLINE]
Free PMC Article

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