Short-Time β-Alanine Supplementation on the Acute Strength Performance after High-Intensity Intermittent Exercise in Recreationally Trained Men
Marcelo Conrado Freitas,
Jason Cholewa,
Valéria Panissa,
Giovanni Quizzini,
João Vitor de Oliveira,
Caique Figueiredo,
Luis Alberto Gobbo,
Erico Caperuto,
Nelo Eidy Zanchi,
Fabio Lira,
Fabrício Eduardo Rossi
Affiliations
Marcelo Conrado Freitas
Department of Nutrition, University of Western São Paulo (UNOESTE), Presidente Prudente, SP 19050-920, Brazil
Jason Cholewa
Department of Kinesiology, Coastal Carolina University, Conway, SC 29576, USA
Valéria Panissa
Department of Sport, School of Physical Education and Sport, University of São Paulo, São Paulo, SP 05508-030, Brazil
Giovanni Quizzini
Skeletal Muscle Assessment Laboratory, School of Technology and Sciences, Department of Physical Education, São Paulo State University, Presidente Prudente, SP 19060-900, Brazil
João Vitor de Oliveira
Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-900, Brazil
Caique Figueiredo
Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-900, Brazil
Luis Alberto Gobbo
Skeletal Muscle Assessment Laboratory, School of Technology and Sciences, Department of Physical Education, São Paulo State University, Presidente Prudente, SP 19060-900, Brazil
Erico Caperuto
University São Judas Tadeu, São Paulo, SP 05503-001, Brazil
Nelo Eidy Zanchi
Laboratory of Cellular and Molecular Biology of Skeletal Muscle (LABCEMME), Department of Physical Education, Federal University of Maranhão, São Luís, MA 65080-805, Brazil
Fabio Lira
Exercise and Immunometabolism Research Group, Department of Physical Education, São Paulo State University (UNESP), Presidente Prudente, SP 19060-900, Brazil
Fabrício Eduardo Rossi
Immunometabolism of Skeletal Muscle and Exercise Research Group, Department of Physical Education, Federal University of Piauí (UFPI), Teresina, PI 64049-550, Brazil
(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.
