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Perception of breakfast ingestion enhances high intensity cycling performance

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journal contribution
posted on 12.10.2017, 12:08 by Stephen Mears, Kathryn Dickinson, Kurt Bergin-Taylor, Reagan Dee, Jack Kay, Lewis James
PURPOSE: To examine the effect on short duration, high intensity cycling time trial performance when a semi-solid breakfast containing carbohydrate or a taste and texture matched placebo is ingested 90 minutes pre-exercise compared to a water control. METHODS: Thirteen well trained cyclists (25 ± 8 years, 71.1 ± 5.9 kg, 1.76 ± 0.04 m, 383 ± 46 Wmax, VO2peak 4.42 ± 0.53 L·min-1) performed three experimental trials examining breakfast ingestion 90 minutes before a 10 minute steady state cycle (60% Wmax) and a ~20 minute time trial (to complete a workload target of 376 ± 36 kJ). Subjects consumed either water (WAT), a semi-solid carbohydrate breakfast (2 g carbohydrate·kg-1 body mass; CHO) or a taste and texture matched placebo (PLA). Blood lactate and glucose concentrations were measured periodically throughout the rest and exercise periods. RESULTS: The time trial was completed quicker in CHO (1120 ± 69 s; P=0.006) and PLA (1112 ± 50 s; P=0.030) compared to WAT (1146 ± 74 s). Ingestion of carbohydrate caused an increase in blood glucose concentration throughout the rest period in CHO (peak at 30 minutes rest: 7.37 ± 1.10 mmol·l-1; P<0.0001) before dropping below baseline levels after the steady state cycling. CONCLUSION: A short duration cycling time trial was completed quicker when subjects perceived that they consumed breakfast (PLA or CHO) 90 minutes prior to the start of exercise. The improvement in performance is likely attributable to a psychological rather than physiological effect.

History

School

  • Sport, Exercise and Health Sciences

Published in

International Journal of Sports Physiology and Performance

Citation

MEARS, S.A. ... et al, 2018. Perception of breakfast ingestion enhances high intensity cycling performance. International Journal of Sports Physiology and Performance, 13(4), pp. 504-509.

Publisher

© Human Kinetics

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

17/08/2017

Publication date

2018

Notes

Accepted author manuscript version reprinted, by permission, from International Journal of Sports Physiology and Performance, 2018, Volume: 13 Issue: 4 Pages: 504-509 https://doi.org/10.1123/ijspp.2017-0318. © Human Kinetics, Inc.

ISSN

1555-0265

eISSN

1555-0273

Language

en

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