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Nutrients 2017, 9(9), 1007; doi:10.3390/nu9091007

Higher Protein Intake Does Not Improve Lean Mass Gain When Compared with RDA Recommendation in Postmenopausal Women Following Resistance Exercise Protocol: A Randomized Clinical Trial

1
School of Medicine, Federal University of Uberlandia (UFU), Av. Pará, n° 1720, Bloco 2U, Campus Umuarama, Uberlandia 38400-902, Minas Gerais, Brazil
2
Exercise Biology Research Group (BioEx), Federal University of Triangulo Mineiro (UFTM), Uberaba 38061-500, Minas Gerais, Brazil
3
Department of Sport Sciences, Federal University of Triangulo Mineiro (UFTM), Uberaba 38061-500, Minas Gerais, Brazil
*
Author to whom correspondence should be addressed.
Received: 24 July 2017 / Revised: 23 August 2017 / Accepted: 25 August 2017 / Published: 12 September 2017
(This article belongs to the Special Issue Nutrition and Ageing)
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Abstract

The aim of this study was to evaluate the effect of a higher protein intake on lean body mass (LBM) gain in postmenopausal women practicing resistance exercise and compare it to the Recommended Dietary Allowance (RDA) recommendation. Twenty-three postmenopausal women (63.2 ± 7.8 years) were randomized into two groups. The group with higher protein intake (n = 11) (HP) received a dietary plan with ~1.2 g·kg−1·day−1 of protein, while the normal protein (NP) group (n = 12) was instructed to ingest ~0.8 g·kg−1·day−1 of protein (RDA recommendation). Both groups performed the same resistance training protocol, 3 times a week, with progression of the number of sets (from 1 to 6 sets) and 8–12 repetitions. The intervention occurred over 10 weeks. Body composition evaluation was performed by dual-energy X-ray absorptiometry. The diet was evaluated by nine 24-h food recall summaries over the course of the study. During the intervention period, the HP group presented a higher protein (1.18 ± 0.3 vs. 0.87 ± 0.2 g·kg−1·day−1, p = 0.008) and leucine (6.0 ± 1.4 vs. 4.3 ± 0.9 g/day, p < 0.001) intake than the NP group, respectively. At the end of the intervention, there were increases in LBM both in HP (37.1 ± 6.2 to 38.4 ± 6.5 kg, p = 0.004) and in NP (37.6 ± 6.2 to 38.8 ± 6.4 kg, p < 0.001), with no differences between the groups (p = 0.572). In conclusion, increased protein intake did not promote higher LBM gain when compared to RDA recommendation in postmenopausal women performing resistance exercise during 10 weeks. This trial was registered at ClinicalTrials.gov as NCT03024125. View Full-Text
Keywords: body composition; protein; RDA recommendations; leucine intake; postmenopausal women body composition; protein; RDA recommendations; leucine intake; postmenopausal women
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MDPI and ACS Style

Rossato, L.T.; Nahas, P.C.; de Branco, F.M.S.; Martins, F.M.; Souza, A.P.; Carneiro, M.A.S.; Orsatti, F.L.; de Oliveira, E.P. Higher Protein Intake Does Not Improve Lean Mass Gain When Compared with RDA Recommendation in Postmenopausal Women Following Resistance Exercise Protocol: A Randomized Clinical Trial. Nutrients 2017, 9, 1007.

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