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Title: Perception of breakfast ingestion enhances high intensity cycling performance
Authors: Mears, Stephen A.
Dickinson, Kathryn
Bergin-Taylor, Kurt
Dee, Reagan
Kay, Jack
James, Lewis J.
Keywords: Carbohydrate
Exercise
Fasted
Placebo
Time trial
Issue Date: 2017
Publisher: © Human Kinetics
Citation: MEARS, S.A. ... et al, 2017. Perception of breakfast ingestion enhances high intensity cycling performance. International Journal of Sports Physiology and Performance, doi:10.1123/ijspp.2017-0318.
Abstract: 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.
Description: Accepted author manuscript version reprinted, by permission, from International Journal of Sports Physiology and Performance, 2017, https://doi.org/10.1123/ijspp.2017-0318. © Human Kinetics, Inc.
Version: Accepted for publication
DOI: 10.1123/ijspp.2017-0318
URI: https://dspace.lboro.ac.uk/2134/26929
Publisher Link: https://doi.org/10.1123/ijspp.2017-0318
ISSN: 1555-0265
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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