Preprint Article Version 1 This version is not peer-reviewed

Perceptual and Physiological Responses to Carbohydrate and Menthol Mouth-Swilling Solutions

Version 1 : Received: 18 November 2020 / Approved: 20 November 2020 / Online: 20 November 2020 (09:30:10 CET)

How to cite: Best, R.; Maulder, P.S.; Berger, N. Perceptual and Physiological Responses to Carbohydrate and Menthol Mouth-Swilling Solutions. Preprints 2020, 2020110528 (doi: 10.20944/preprints202011.0528.v1). Best, R.; Maulder, P.S.; Berger, N. Perceptual and Physiological Responses to Carbohydrate and Menthol Mouth-Swilling Solutions. Preprints 2020, 2020110528 (doi: 10.20944/preprints202011.0528.v1).

Abstract

Carbohydrate and menthol mouth-swilling have been used to enhance exercise performance in the heat. However, these strategies differ in mechanism and subjective experience. Participants (n=12) sat for 60 min in hot conditions (35°C; 15±2%), following a 15 min control period, participants undertook three 15 min testing blocks. A randomised swill (Carbohydrate; Menthol; Water) was administered per testing block (one swill every three minutes within each block). Heart rate, tympanic temperature, thermal comfort, thermal sensation and thirst were recorded every three minutes. Data were analysed by ANOVA, with carbohydrate intake controlled for via ANCOVA. Small elevations in heart rate were observed after carbohydrate (ES: 0.22 ± 90% CI: -0.09 to 0.52) and water swilling (0.26; -0.04 to 0.54). Menthol showed small improvements in thermal comfort relative to carbohydrate (-0.33; -0.63 to 0.03) and water (-0.40; -0.70 to -0.10), and induced moderate reductions in thermal sensation (-0.71; -1.01 to -0.40 and -0.66; -0.97 to -0.35, respectively). Menthol reduced thirst by a small to moderate extent. These effects persisted when controlling for dietary carbohydrate intake. Carbohydrate and water may elevate heart rate, whereas menthol elicits small improvements in thermal comfort, moderately improves thermal sensation and may mitigate thirst; these effects persist when dietary carbohydrate intake is controlled for.

Subject Areas

Carbohydrate; Menthol; Thermal Comfort; Thermal Sensation; Thirst; Water

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our diversity statement.

Leave a public comment
Send a private comment to the author(s)
Views 0
Downloads 0
Comments 0
Metrics 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.