title: Carbohydrate Mouth Rinse Maintains Muscle Electromyographic Activity and Increases Time to Exhaustion during Moderate but not High-Intensity Cycling Exercise.
abstract: The aim was to investigate the influence of a carbohydrate (CHO) mouth rinse on the vastus lateralis (VL) and rectus femoris (RF) electromyographic activity (EMG) and time to exhaustion (TE) during moderate (MIE) and high-intensity cycling exercise (HIE). Thirteen participants cycled at 80% of their respiratory compensation point and at 110% of their peak power output to the point of exhaustion. Before the trials and every 15 min during MIE, participants rinsed with the CHO or Placebo (PLA) solutions. The root mean square was calculated. CHO had no effect on the TE during HIE (CHO: 177.3 ± 42.2 s; PLA: 163.0 ± 26.7 s, p = 0.10), but the TE was increased during MIE (CHO: 76.6 ± 19.7 min; PLA: 65.4 ± 15.2 min; p = 0.01). The EMG activity in the VL was higher than PLA at 30 min (CHO: 10.5% ± 2.6%; PLA: 7.7% ± 3.3%; p = 0.01) and before exhaustion (CHO: 10.3% ± 2.5%; PLA: 8.0% ± 2.9%; p = 0.01) with CHO rinsing. There was no CHO effect on the EMG activity of RF during MIE or for VL and RF during HIE. CHO mouth rinse maintains EMG activity and enhances performance for MIE but not for HIE.
authors.affiliation: Research Group Applied to Sport Science-GPCAE, Federal University of Alagoas, Avenue Lourival Melo Mota, s/n, Maceió-AL 57072-900, Brazil. victormat16@hotmail.com.
authors.forename: Victor José
authors.initials: VJ
authors.lastname: Bastos-Silva
authors.affiliation: Research Group Applied to Sport Science-GPCAE, Federal University of Alagoas, Avenue Lourival Melo Mota, s/n, Maceió-AL 57072-900, Brazil. alan_melo@hotmail.com.
authors.forename: Alan de Albuquerque
authors.initials: Ade A
authors.lastname: Melo
authors.affiliation: Sport Science Research Group-GPCE, Federal University of Pernambuco, Alto do Reservatório street, Bela Vista, Vitória de Santo Antão-PE 608-680, Brazil. adrianosilva@usp.br.
authors.forename: Adriano Eduardo
authors.initials: AE
authors.lastname: Lima-Silva
authors.affiliation: Laboratory of Applied Biomechanics, State University of Londrina, Avenue Gil de Abreu e Souza, 2335, Unidade 1121, Esperança, Londrina 86058-100, Brazil. felipearrudamoura@gmail.com.
authors.forename: Felipe Arruda
authors.initials: FA
authors.lastname: Moura
authors.affiliation: Endurance Performance Research Group, University of São Paulo, Avenue Prof. Mello de Morais, 65, São Paulo SP 05508-030, Brazil. bertuzzi@usp.br.
authors.forename: Rômulo
authors.initials: R
authors.lastname: Bertuzzi
authors.affiliation: Research Group Applied to Sport Science-GPCAE, Federal University of Alagoas, Avenue Lourival Melo Mota, s/n, Maceió-AL 57072-900, Brazil. gusta_ef@yahoo.com.br.
authors.forename: Gustavo Gomes
authors.initials: GG
authors.lastname: de Araujo
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001642:Bicycling; D018592:Cross-Over Studies; D004311:Double-Blind Method; D004576:Electromyography; D015444:Exercise; D005080:Exercise Test; D017079:Exercise Tolerance / Q000187:drug effects*; D006801:Humans; D008297:Male; D009067:Mouthwashes; D009119:Muscle Contraction / Q000187:drug effects*; D018763:Muscle Fatigue / Q000187:drug effects; D010101:Oxygen Consumption / Q000187:drug effects; D011134:Polysaccharides / Q000008:administration & dosage*; D052097:Quadriceps Muscle / Q000187:drug effects* / Q000378:metabolism; D013997:Time Factors; D055815:Young Adult
chemical_list: D009067:Mouthwashes; D011134:Polysaccharides; C008315:maltodextrin
keywords: athletic performance; central nervous system; maltodextrin; mouthwash