Quinine ingestion during the latter stages of a 3,000-m time trial fails to improve cycling performance
Journal article
Etxebarria, Naroa, Clark, Brad, Ross, Megan L., Hui, Timothy,, Goecke, Roland, Rattray, Ben and Burke, Louise, M.. (2021). Quinine ingestion during the latter stages of a 3,000-m time trial fails to improve cycling performance. International Journal of Sport Nutrition and Exercise Metabolism. 31(1), pp. 9-12. https://doi.org/10.1123/IJSNEM.2020-0265
Authors | Etxebarria, Naroa, Clark, Brad, Ross, Megan L., Hui, Timothy,, Goecke, Roland, Rattray, Ben and Burke, Louise, M. |
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Abstract | The ingestion of quinine, a bitter tastant, improves short-term (30 s) cycling performance, but it is unclear whether this effect can be integrated into the last effort of a longer race. The purpose of this study was to determine whether midtrial quinine ingestion improves 3,000-m cycling time-trial (TT) performance. Following three familiarization TTs, 12 well-trained male cyclists (mean ± SD: mass = 76.6 ± 9.2 kg, maximal aerobic power = 390 ± 50 W, maximal oxygen uptake = 4.7 ± 0.6 L/min) performed four experimental 3,000-m TTs on consecutive days. This double-blind, crossover design study had four randomized and counterbalanced conditions: (a) Quinine 1 (25-ml solution, 2 mM of quinine); (b) Quinine 2, replicate of Quinine 1; (c) a 25-ml sweet-tasting no-carbohydrate solution (Placebo); and (d) 25 ml of water (Control) consumed at the 1,850-m point of the TT. The participants completed a series of perceptual scales at the start and completion of all TTs, and the power output was monitored continuously throughout all trials. The power output for the last 1,000 m for all four conditions was similar: mean ± SD: Quinine 1 = 360 ± 63 W, Quinine 2 = 367 ± 63 W, Placebo = 364 ± 64 W, and Control = 367 ± 58 W. There were also no differences in the 3,000-m TT power output between conditions. The small perceptual differences between trials at specific 150-m splits were not explained by quinine intake. Ingesting 2 mM of quinine during the last stage of a 3,000-m TT did not improve cycling performance. |
Keywords | ergogenic aid; power output; supplement; tastants |
Year | 2021 |
Journal | International Journal of Sport Nutrition and Exercise Metabolism |
Journal citation | 31 (1), pp. 9-12 |
Publisher | Human Kinetics, Inc. |
ISSN | 1526-484X |
Digital Object Identifier (DOI) | https://doi.org/10.1123/IJSNEM.2020-0265 |
Scopus EID | 2-s2.0-85100461532 |
Research or scholarly | Research |
Page range | 9-12 |
Publisher's version | License All rights reserved File Access Level Controlled |
Output status | Published |
Publication dates | |
Online | 01 Dec 2020 |
Publication process dates | |
Deposited | 01 Jul 2021 |
https://acuresearchbank.acu.edu.au/item/8w4vv/quinine-ingestion-during-the-latter-stages-of-a-3-000-m-time-trial-fails-to-improve-cycling-performance
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