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Open AccessArticle

Short-Time β-Alanine Supplementation on the Acute Strength Performance after High-Intensity Intermittent Exercise in Recreationally Trained Men

1
Department of Nutrition, University of Western São Paulo (UNOESTE), Presidente Prudente, SP 19050-920, Brazil
2
Department of Kinesiology, Coastal Carolina University, Conway, SC 29576, USA
3
Department of Sport, School of Physical Education and Sport, University of São Paulo, São Paulo, SP 05508-030, Brazil
4
Skeletal Muscle Assessment Laboratory, School of Technology and Sciences, Department of Physical Education, São Paulo State University, Presidente Prudente, SP 19060-900, Brazil
5
Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-900, Brazil
6
University São Judas Tadeu, São Paulo, SP 05503-001, Brazil
7
Laboratory of Cellular and Molecular Biology of Skeletal Muscle (LABCEMME), Department of Physical Education, Federal University of Maranhão, São Luís, MA 65080-805, Brazil
8
Immunometabolism of Skeletal Muscle and Exercise Research Group, Department of Physical Education, Federal University of Piauí (UFPI), Teresina, PI 64049-550, Brazil
9
Associate Graduate Program in Health Science, Federal University of Piauí (UFPI), Teresina, PI 64049-550, Brazil
*
Author to whom correspondence should be addressed.
Sports 2019, 7(5), 108; https://doi.org/10.3390/sports7050108
Received: 6 April 2019 / Revised: 3 May 2019 / Accepted: 7 May 2019 / Published: 9 May 2019
(This article belongs to the Special Issue Optimising Interval Training Prescription)
(1) Background: We investigated the effects of 28 days of beta-alanine (β-alanine) supplementation on the acute interference effect of high-intensity intermittent exercise (HIIE) on lower-body resistance exercise performance, body composition, and strength when combined with a resistance training program. (2) Methods: Twenty-two males were randomized into: β-alanine supplementation (6.4 g/day) or placebo (6.4 g/day maltodextrin) during 28 days. Total body water, intracellular and extracellular water, fat-free mass (FFM), and fat mass were assessed using bioelectrical impedance. Participants performed 5000-m HIIE (1:1 effort and rest ratio) followed by resistance exercise (four sets of 80% at 45° leg press until muscular failure) at baseline and after 28 days. The resistance training program consisted of three sets of 10 to 12 RM with 90 s of rest, four days per week. (3) Results: For the post-HIIE leg press volume, higher values were observed post-training than pre-training, but no group x time interaction was observed. There was a non-significant trend for an interaction in the FFM change (β-alanine = 2.8% versus placebo = 1.0%, p = 0.072). (4) Conclusion: Twenty-eight days of β-alanine supplementation did not prevent acute strength loss during resistance exercise after high-intensity interval exercise, nor increase strength or hypertrophic adaptations associated with resistance training. View Full-Text
Keywords: ergogenic aids; strength; amino acids; pre-workout; body composition ergogenic aids; strength; amino acids; pre-workout; body composition
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Freitas, M.C.; Cholewa, J.; Panissa, V.; Quizzini, G.; de Oliveira, J.V.; Figueiredo, C.; Gobbo, L.A.; Caperuto, E.; Zanchi, N.E.; Lira, F.; Rossi, F.E. Short-Time β-Alanine Supplementation on the Acute Strength Performance after High-Intensity Intermittent Exercise in Recreationally Trained Men. Sports 2019, 7, 108.

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