No dose-response effect of carbohydrate mouth rinse concentration on 5 km running performance in recreational athletes

Neil D. Clarke, James R. Thomas, Marion Kagka, Roger Ramsbottom, Anne Delextrat

Research output: Contribution to journalArticle

16 Citations (Scopus)
193 Downloads (Pure)

Abstract

Oral carbohydrate rinsing has been demonstrated to provide beneficial effects on exercise performance of durations of up to one hour, albeit predominately in a laboratory setting. The aim of the present study was to investigate the effects of different concentrations of carbohydrate solution mouth-rinse on 5 km running performance. Fifteen healthy men (n=9; mean±SD age: 42±10 years; height: 177.6±6.1 cm; body mass: 73.9±8.9 kg) and women (n=6; mean±SD age: 43±9 years; height: 166.5±4.1 cm; body mass: 65.7±6.8 kg) performed a 5 km running time trial on a track on four separate occasions. Immediately before starting the time trial and then after each 1 km, subjects rinsed 25 mL of either 0, 3, 6, or 12% maltodextrin for 10 s. Mouth-rinsing with 0, 3, 6 or 12% maltodextrin did not have a significant effect on the time to complete the time trial (0%: 26:34±4:07 min:sec; 3%: 27:17±4:33 min:sec; 6%: 27:05±3:52 min:sec; 12%: 26:47±4.31 min:sec; P=0.071; 2 P  =0.15), heart rate (P=0.095; 2 P  =0.16), rating of perceived exertion (RPE) (P=0.195; 2 P  =0.11), blood glucose (P=0.920; 2 P  =0.01) and blood lactate concentration (P=0.831; 2 P  =0.02), with only non-significant trivial to small differences between concentrations. Results of this study suggest that carbohydrate mouth-rinsing provides no ergogenic advantage over that of an acaloric placebo (0%), and that there is no dose-response relationship between carbohydrate solution concentration and 5 km track running performance.
Original languageEnglish
Pages (from-to)715-720
Number of pages6
JournalThe Journal of Strength & Conditioning Research
Volume31
Issue number3
Early online date30 Jun 2016
DOIs
Publication statusPublished - 1 Mar 2017

Keywords

  • Maltodextrin
  • Oral receptors
  • Field-based

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