ORIGINAL ARTICLE  BODY COMPOSITION, NUTRITION AND SUPPLEMENTATION 

The Journal of Sports Medicine and Physical Fitness 2021 October;61(10):1362-8

DOI: 10.23736/S0022-4707.20.11774-2

Copyright © 2020 EDIZIONI MINERVA MEDICA

language: English

The effects of acute consumption of carbohydrate-protein supplement in varied ratios on CrossFit athletes’ performance in two CrossFit exercises: a randomized cross-over trial

Khashayar MAROUFI ¹ ✉, Rashin RAZAVI ², Abbas A. GAEINI ¹, Maryam NOURSHAHI ²

¹ Faculty of Physical Education and Sport Sciences, University of Tehran, Tehran, Iran; ² Faculty of Sport Sciences and Health, Shahid Beheshti University, Tehran, Iran

BACKGROUND: CrossFit is becoming popular over the past few years, and various supplementation ways have been utilized by exercise physiologists to enhance CrossFit athletes’ performance. This study aimed to evaluate the effects of consuming preworkout carbohydrate-protein supplements on CrossFit athletes’ performance.
METHODS: Well-trained CrossFit athletes (8 men; 25.62±3.02 years) were randomized to a single-blind, placebo controlled, crossover design (7-day washout) to performed six bouts of two CrossFit workouts: Fight Gone Bad (FGB) and Cindy (CI). One hour and immediately before the onset of each bout, the subjects consumed carbohydrate-protein supplement in two ratios (2:2 or 3:1) or placebo (P): FGB+2:2, FGB+3:1, FGB+P, CI+2:2, CI+3:1, and CI+P. To value the differentiation in performances, the performed each subject repetitions in FGB and CI were recorded in the bouts.
RESULTS: Repeated measure analysis of variance was used to analyze the data, and the level of significance set for the study was P≤0.05. No significant difference was observed in the total number of repetitions performed in FGB (P=0.275) or CI (P=0.789) workouts in supplements and placebo groups.
CONCLUSIONS: These results indicate that acute consumption of preworkout carbohydrate-protein supplement may not enhance the CrossFit athletes’ performance in FGB and CI workouts.

KEY WORDS: Dietary supplements; Sports; Exercise