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Date of Award
Spring 2023
Rights
Access restricted for 2 years to EWU users with an active EWU NetID
Date Available to Non-EWU Users
2025-06-13
Document Type
Thesis: EWU Only
Degree Name
Master of Science (MS) in Wellness and Movement Sciences
Department
Wellness and Movement Sciences
Abstract
In recent years, the use of supplements to aid resistance training performance has increased, particularly through the consumption of multi-ingredient pre-workout supplements (MIPS). However, limited research exists regarding the efficacy of MIPS on physiological and psychological performance in resistance-trained females.
PURPOSE: To determine the physiological and psychological performance effects of MIPS compared to a placebo and caffeine-only supplement in resistance-trained females.
METHODS: Resistance-trained females (n=10) volunteered for the study. One-repetition maximum (1RM) was established at baseline for leg press (LP) and bench press (BP). A within-groups, double-blind, randomized, and counterbalanced design was used to assign the four supplement drinks (i.e., placebo, caffeine-only, single MIPS dose, and double MIPS dose). Following a progressive-load warm-up, participants completed repetitions to failure at 75% of 1RM for LP and BP. Participants completed questionnaires to assess rating of perceived exertion (RPE), rating of fatigue (ROF), and exercise enjoyment. Data were analyzed using one-way repeated measures ANOVA with an alpha level set at .05. RESULTS: There were no differences in repetitions to failure (LP: p = .44; BP: p = .54), RPE (LP: p = .08; BP: p = .70), ROF (LP: p = .09; BP: p = .86), or exercise enjoyment (LP: p = .67; BP: p = .88) across the four supplements. CONCLUSIONS: Our findings suggest that caffeine or MIPS consumption may not delay muscular failure or enhance subjective feelings of exertion in resistance-trained females. Future research should explore timing of MIPS, long-term use, and ingredients to determine the ergogenic benefit for resistance-trained females.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Recommended Citation
Snyder, Mariah L., "The physiological and psychological performance effects of multi-ingredient pre-workout supplements in females during resistance training" (2023). EWU Masters Thesis Collection. 886.
https://dc.ewu.edu/theses/886
