Multi-Ingredient Preworkout Supplementation Compared With Caffeine and a Placebo Does Not Improve Repetitions to Failure in Resistance-Trained Women.
Int J Sports Physiol Perform
; 19(6): 593-599, 2024 Jun 01.
Article
em En
| MEDLINE
| ID: mdl-38608716
ABSTRACT
There has been an increase in the use of commercially available multi-ingredient preworkout supplements (MIPS); however, there are inconsistencies regarding the efficacy of MIPS in resistance-trained women. PURPOSE:
To determine the effect of varying doses of MIPS compared with caffeine only (C) and a placebo (PL) on resistance-training performance in trained women.METHODS:
Ten women (21.5 [2.3] y) completed 1-repetition-maximum tests at baseline for leg press and bench press. A within-group, double-blind, and randomized design was used to assign supplement drinks (ie, PL, C, MIPS half scoop [MIPS-H], and MIPS full scoop [MIPS-F]). Repetitions to failure were assessed at 75% and 80% to 85% of 1-repetition maximum for bench and leg press, respectively. Total performance volume was calculated as load × sets × repetitions for each session. Data were analyzed using a 1-way repeated-measures analysis of variance and reported as means and SDs.RESULTS:
There were no differences in repetitions to failure for bench press (PL 14.4 [3.2] repetitions, C 14.4 [2.9] repetitions, MIPS-H 14.2 [2.6] repetitions, MIPS-F 15.1 [3.1] repetitions; P = .54) or leg press (PL 13.9 [7.8] repetitions, C 10.8 [5.9] repetitions, MIPS-H 13.1 [7.1] repetitions, MIPS-F 12.4 [10.7] repetitions; P = .44). Furthermore, there were no differences in total performance volume across supplements for bench press (PL 911.2 [212.8] kg, C 910.7 [205.5] kg, MIPS-H 913.6 [249.3] kg, MIPS-F 951.6 [289.6] kg; P = .39) or leg press (PL 4318.4 [1633.6] kg, C 3730.0 [1032.5] kg, MIPS-H 4223.0 [1630.0] kg, MIPS-F 4085.5 [2098.3] kg; P = .34).CONCLUSIONS:
Overall, our findings suggest that caffeine and MIPS do not provide ergogenic benefits for resistance-trained women in delaying muscular failure.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Cafeína
/
Suplementos Nutricionais
/
Desempenho Atlético
/
Treinamento Resistido
Limite:
Adult
/
Female
/
Humans
Idioma:
En
Revista:
Int J Sports Physiol Perform
Assunto da revista:
FISIOLOGIA
/
MEDICINA ESPORTIVA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Estados Unidos