Effect Of Carbohydrate Mouth Rinse On Training Load Volume In Resistance Exercises

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Abstract

The aim of this study was to investigate the effect of carbohydrate (CHO) mouth rinse on training load volume [TLV - number of repetitions x load lifted (kg)] on two resistance exercises, leg press (LP) and bench press (BP). Twelve recreational resistance trained males were recruited. Subjects were assessed for one-repetition maximum (1-RM) and muscular endurance (ME) in LP and BP. ME was determined by the maximum number of repetitions performed to volitional fatigue, with a load equal to 80% of 1-RM. Exercises were performed on separate days (72 h apart) under three experimental conditions: control (CONT), CHO (25 mL with 6.4% of maltodextrin) and placebo [juice without CHO (PLA)]. CHO and PLA were used immediately prior to 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.

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