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Effect of Carbohydrate Mouth Rinse on Training Load Volume in Resistance Exercises

Bastos-Silva, Victor J.1; Prestes, Jonato2; Geraldes, Amandio A.R.1

The Journal of Strength & Conditioning Research: June 2019 - Volume 33 - Issue 6 - p 1653–1657
doi: 10.1519/JSC.0000000000002092
Original Research
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Bastos-Silva, VJ, Prestes, J, and Geraldes, AAR. Effect of carbohydrate mouth rinse on training load volume in resistance exercises. J Strength Cond Res 33(6): 1654–1658, 2019—The aim of this study was to investigate the effect of carbohydrate (CHO) mouth rinse on training load volume (TLV—number of repetitions × load lifted [kg]) on 2 resistance exercises: leg press (LP) and bench press (BP). Twelve recreational resistance trained males were recruited. Subjects were assessed for 1 repetition maximum (1RM) and muscular endurance (ME) in LP and BP. Muscular endurance was determined by the maximum number of repetitions performed to volitional fatigue, with a load equal to 80% of 1RM. Exercises were performed on separate days (72 hours apart) under 3 experimental conditions: control (CONT), CHO (25 ml with 6.4% of maltodextrin), and placebo (juice without CHO [PLA]). Carbohydrate and PLA were used immediately before each exercise. There was no significant difference between conditions for the number of repetitions (CHO = 13.5 ± 4.8; PLA = 11.5 ± 4.4; CONT = 12.4 ± 4.4, p = 0.68) nor TLV (CHO = 2006.7 ± 825.2 kg; PLA = 1712.5 ± 772.9 kg; CONT = 1817.1 ± 672.6 kg, p = 0.99) in LP. However, CHO increased both repetitions (CHO = 8.2 ± 1.6; PLA = 7.1 ± 2.4; CONT = 6.8 ± 1.8, p = 0.002) and TLV (CHO = 557.1 ± 155.4 kg; PLA = 495.9 ± 206.1 kg; CONT = 476.1 ± 175.3 kg, p = 0.035) compared with CON in BP. Thus, a CHO mouth rinse increases BP performance in trained men, suggesting an interesting strategy to be used by experienced resistance training practitioners.

1 Laboratory of Physical Fitness, Performance, and Health, Federal University of Alagoas, Maceió, Brazil;

2Graduaton Program on Physical Education, Catholic University of Brasilia, Brasília, Brazil

Address correspondence to Victor J. Bastos-Silva, victormat16@hotmail.com.

Copyright © 2019 by the National Strength & Conditioning Association.