• Filippo Giorgio Di Girolamo, Roberta Situlin, Nicola Fiotti, Marcello Tence, Paolo De Colle, Filippo Mearelli, Marco Alessandro Minetto, Ezio Ghigo, Massimo Pagani, Daniela Lucini, Fabio Pigozzi, Piero Portincasa, Gabriele Toigo, and Gianni Biolo.
• Clinica Medica ASUITs, Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy.
• Nutrition. 2017 Oct 1; 42: 82-86.

ObjectiveThe optimal protein intake for elderly individuals who exercise regularly has not yet been clearly defined. The aim of this study was to test the hypothesis that protein intake level is associated with muscle strength in elderly elite athletes.MethodsWe evaluated 50 elite senior athletes (38 men and 12 women) participating in the European Master Games 2011 in an observational cross-sectional study. Participants were divided into two groups-lower (LPI) or higher (HPI) protein intake-according to the median value of their ratio of urinary urea nitrogen to urinary creatinine (i.e., 8.8 g/L), as a marker of protein intake. A dietary interview confirmed differences in protein consumption between the LPI and HPI groups. We also evaluated body composition (bioimpedance), muscle strength, and hematochemical indices.ResultsLPI and HPI groups were homogeneous for age (72 [68-74] and 71 [68-74] y, respectively), fat-free mass index (18.4 [17-19.4] and 18.2 [17-19.1] kg/m(2)), body fat (18.3% [12.3-20.7%] and 16.6% [13.6-21.2%]), and glomerular filtration rate (57.7 [53.8-64.9] and 62.7 [56.1-69.3] mL/min/1.73 m(2)). The HPI group showed greater leg and trunk muscle strength (N) compared with the LPI group (left leg extension, 339 [238-369] versus 454 [273-561], respectively, P < 0.05; right leg extension, 319 [249-417] versus 432 [334-635], P ≤ 0.05; trunk extension, 435 [370-467] versus 464 [390-568], P ≤ 0.05).ConclusionsHigher protein intake in elite senior athletes is associated with a greater muscle strength.Copyright © 2017 Elsevier Inc. All rights reserved.

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