Artículos de revistas
Short-Time -Alanine Supplementation on the Acute Strength Performance after High-Intensity Intermittent Exercise in Recreationally Trained Men
Fecha
2019-05-01Registro en:
Sports. Basel: Mdpi, v. 7, n. 5, 13 p., 2019.
2075-4663
10.3390/sports7050108
WOS:000470957300013
6550959666011238
Autor
Univ Western Sao Paulo UNOESTE
Coastal Carolina Univ
Universidade de São Paulo (USP)
Universidade Estadual Paulista (Unesp)
Univ Sao Judas Tadeu
Univ Fed Maranhao
Fed Univ Piaui UFPI
Institución
Resumen
(1) Background: We investigated the effects of 28 days of beta-alanine (-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: -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 degrees 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 (-alanine = 2.8% versus placebo = 1.0%, p = 0.072). (4) Conclusion: Twenty-eight days of -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.