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Related Experiment Video

Updated: Jan 19, 2026

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Mouth Rinsing Cabohydrates Serially Does Not Improve Repeated Sprint Time.

Patrick M Tomko1, C Matthew Laurent2, Adam M Fullenkamp3

  • 1Oklahoma State University, Department of Health and Human Performance, Stillwater, OK, USA.

Journal of Human Kinetics
|September 17, 2019
PubMed
Summary

Serial carbohydrate mouth rinsing (CMR) did not significantly improve sprint performance. Increasing rinse duration across sprint sets had minimal impact on sprint times or perceived exertion during high-intensity exercise.

Keywords:
PRSRASTRPEhigh intensityspeedsprinters

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Area of Science:

  • Exercise Physiology
  • Sports Nutrition
  • Human Performance

Background:

  • Oral carbohydrate sensing enhances performance in high-intensity exercise.
  • The optimal duration and frequency of carbohydrate mouth rinsing (CMR) for sustained sprint performance remain unclear.

Purpose of the Study:

  • To investigate if serial increases in CMR duration across repeated sprint sets attenuate performance decline compared to a fixed short rinse.
  • To examine the effects of serial CMR on sprint performance and perceptual responses.

Main Methods:

  • Fifteen trained sprinters performed three repeated anaerobic sprint tests (RAST) under two conditions: 5-second CMR and serial rinsing (5s, 10s, 15s).
  • Measures included sprint times, rating of perceived exertion (RPE) per sprint, blood lactate, perceived recovery status (PRS), feeling of arousal (FAS), and session RPE (S-RPE).

Main Results:

  • No significant differences were found in peak or average sprint times between the 5-second CMR and serial rinsing conditions.
  • Perceptual measures (RPE, PRS, FAS, S-RPE) and blood lactate concentrations also showed no significant differences between conditions.
  • Serial rinsing demonstrated a trivial effect on sprint speed but a 50% chance of making the session feel less difficult.

Conclusions:

  • Serial increases in carbohydrate mouth rinse duration do not provide significant benefits for repeated sprint performance or associated perceptual responses.
  • The findings suggest that the duration of carbohydrate presence in the oral cavity, when increased serially, has a negligible impact on high-intensity sprint capacity.