A novel bitter solution can increase short-term power output in a 3 km cycling time-trial

Naroa ETXEBARRIA, Megan L R Ross, Brad Clark, Louise M Burke

Research output: Contribution to conference (non-published works)Abstract

Abstract

Introduction: Track cycling includes short and very high intensity events such as the team pursuit. Maximal 30 s cycling performance can be improved by ingestion of a bitter drink (quinine)1, but it is unclear whether the effects last long enough to enhance 3 km maximal time trial (TT) performance. We quantified the effects of 2 mM quinine ingestion prior to a 3 km maximal cycling TT. Methods: Nine well-trained male cyclists (mass 78 ± 11 kg; height 181 ± 7 cm and maximal aerobic power 386 ± 38 W; mean ± SD) performed a maximal incremental test, three 3 km familiarisation trials and four different 3 km time trials in a total of 8 separate visits to the laboratory. The four treatments administered in a randomised and counterbalanced manner were: 1) 25 ml of water, 2) a 25 ml sweet solution (placebo) and 3) and 4) repeat 2mM quinine solutions, 30 s prior to the commencement of each trial. Each time trial was performed on a VelotronR cycle ergometer with participants being blind to power output, cadence and other feedback except for distance covered.
Participants were allowed to self-select their gears and free to change gears during the time trials. Power output (W) was monitored continuously during all trials. Descriptive statistics are represented as mean ± SD and differences between the interventions are specified as standardized mean difference ± 90% confidence limits. Results: There was no substantial ergogenic effect of quinine on 3 km TT cycling performance. Mean power output for all four conditions was
similar: 348 ± 45 W (water), 354 ± 47 W (quinine1); 355 ± 47 W (sweet), and 355 ± 48 (quinine2). Quinine administration increased power output during the first km by ~18 ± 9 W over water, followed by a decay in power output in the final stages. Discussion: It appears ingesting 2mM of quinine improves cycling performance during the first 1/3 of a 3 km TT but there is also a greater decay in power output during the rest of the TT. Quinine does not appear to improve an individual 3 km performance and might only be useful for short-term (~30s) efforts. The elevated power output during 1st km could be exploited in the team pursuit event by supplementing the lead-off rider.
Original languageEnglish
Pages304-305
Number of pages2
Publication statusPublished - Jul 2017
EventAnnual Congress of the European-College-of-Sport-Sciences -
Duration: 1 Jan 2011 → …

Conference

ConferenceAnnual Congress of the European-College-of-Sport-Sciences
Period1/01/11 → …

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Quinine
Water
Performance-Enhancing Substances
Eating
Placebos

Cite this

ETXEBARRIA, N., Ross, M. L. R., Clark, B., & Burke, L. M. (2017). A novel bitter solution can increase short-term power output in a 3 km cycling time-trial. 304-305. Abstract from Annual Congress of the European-College-of-Sport-Sciences, .
ETXEBARRIA, Naroa ; Ross, Megan L R ; Clark, Brad ; Burke, Louise M. / A novel bitter solution can increase short-term power output in a 3 km cycling time-trial. Abstract from Annual Congress of the European-College-of-Sport-Sciences, .2 p.
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title = "A novel bitter solution can increase short-term power output in a 3 km cycling time-trial",
abstract = "Introduction: Track cycling includes short and very high intensity events such as the team pursuit. Maximal 30 s cycling performance can be improved by ingestion of a bitter drink (quinine)1, but it is unclear whether the effects last long enough to enhance 3 km maximal time trial (TT) performance. We quantified the effects of 2 mM quinine ingestion prior to a 3 km maximal cycling TT. Methods: Nine well-trained male cyclists (mass 78 ± 11 kg; height 181 ± 7 cm and maximal aerobic power 386 ± 38 W; mean ± SD) performed a maximal incremental test, three 3 km familiarisation trials and four different 3 km time trials in a total of 8 separate visits to the laboratory. The four treatments administered in a randomised and counterbalanced manner were: 1) 25 ml of water, 2) a 25 ml sweet solution (placebo) and 3) and 4) repeat 2mM quinine solutions, 30 s prior to the commencement of each trial. Each time trial was performed on a VelotronR cycle ergometer with participants being blind to power output, cadence and other feedback except for distance covered.Participants were allowed to self-select their gears and free to change gears during the time trials. Power output (W) was monitored continuously during all trials. Descriptive statistics are represented as mean ± SD and differences between the interventions are specified as standardized mean difference ± 90{\%} confidence limits. Results: There was no substantial ergogenic effect of quinine on 3 km TT cycling performance. Mean power output for all four conditions wassimilar: 348 ± 45 W (water), 354 ± 47 W (quinine1); 355 ± 47 W (sweet), and 355 ± 48 (quinine2). Quinine administration increased power output during the first km by ~18 ± 9 W over water, followed by a decay in power output in the final stages. Discussion: It appears ingesting 2mM of quinine improves cycling performance during the first 1/3 of a 3 km TT but there is also a greater decay in power output during the rest of the TT. Quinine does not appear to improve an individual 3 km performance and might only be useful for short-term (~30s) efforts. The elevated power output during 1st km could be exploited in the team pursuit event by supplementing the lead-off rider.",
author = "Naroa ETXEBARRIA and Ross, {Megan L R} and Brad Clark and Burke, {Louise M}",
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ETXEBARRIA, N, Ross, MLR, Clark, B & Burke, LM 2017, 'A novel bitter solution can increase short-term power output in a 3 km cycling time-trial' Annual Congress of the European-College-of-Sport-Sciences, 1/01/11, pp. 304-305.

A novel bitter solution can increase short-term power output in a 3 km cycling time-trial. / ETXEBARRIA, Naroa; Ross, Megan L R; Clark, Brad; Burke, Louise M.

2017. 304-305 Abstract from Annual Congress of the European-College-of-Sport-Sciences, .

Research output: Contribution to conference (non-published works)Abstract

TY - CONF

T1 - A novel bitter solution can increase short-term power output in a 3 km cycling time-trial

AU - ETXEBARRIA, Naroa

AU - Ross, Megan L R

AU - Clark, Brad

AU - Burke, Louise M

PY - 2017/7

Y1 - 2017/7

N2 - Introduction: Track cycling includes short and very high intensity events such as the team pursuit. Maximal 30 s cycling performance can be improved by ingestion of a bitter drink (quinine)1, but it is unclear whether the effects last long enough to enhance 3 km maximal time trial (TT) performance. We quantified the effects of 2 mM quinine ingestion prior to a 3 km maximal cycling TT. Methods: Nine well-trained male cyclists (mass 78 ± 11 kg; height 181 ± 7 cm and maximal aerobic power 386 ± 38 W; mean ± SD) performed a maximal incremental test, three 3 km familiarisation trials and four different 3 km time trials in a total of 8 separate visits to the laboratory. The four treatments administered in a randomised and counterbalanced manner were: 1) 25 ml of water, 2) a 25 ml sweet solution (placebo) and 3) and 4) repeat 2mM quinine solutions, 30 s prior to the commencement of each trial. Each time trial was performed on a VelotronR cycle ergometer with participants being blind to power output, cadence and other feedback except for distance covered.Participants were allowed to self-select their gears and free to change gears during the time trials. Power output (W) was monitored continuously during all trials. Descriptive statistics are represented as mean ± SD and differences between the interventions are specified as standardized mean difference ± 90% confidence limits. Results: There was no substantial ergogenic effect of quinine on 3 km TT cycling performance. Mean power output for all four conditions wassimilar: 348 ± 45 W (water), 354 ± 47 W (quinine1); 355 ± 47 W (sweet), and 355 ± 48 (quinine2). Quinine administration increased power output during the first km by ~18 ± 9 W over water, followed by a decay in power output in the final stages. Discussion: It appears ingesting 2mM of quinine improves cycling performance during the first 1/3 of a 3 km TT but there is also a greater decay in power output during the rest of the TT. Quinine does not appear to improve an individual 3 km performance and might only be useful for short-term (~30s) efforts. The elevated power output during 1st km could be exploited in the team pursuit event by supplementing the lead-off rider.

AB - Introduction: Track cycling includes short and very high intensity events such as the team pursuit. Maximal 30 s cycling performance can be improved by ingestion of a bitter drink (quinine)1, but it is unclear whether the effects last long enough to enhance 3 km maximal time trial (TT) performance. We quantified the effects of 2 mM quinine ingestion prior to a 3 km maximal cycling TT. Methods: Nine well-trained male cyclists (mass 78 ± 11 kg; height 181 ± 7 cm and maximal aerobic power 386 ± 38 W; mean ± SD) performed a maximal incremental test, three 3 km familiarisation trials and four different 3 km time trials in a total of 8 separate visits to the laboratory. The four treatments administered in a randomised and counterbalanced manner were: 1) 25 ml of water, 2) a 25 ml sweet solution (placebo) and 3) and 4) repeat 2mM quinine solutions, 30 s prior to the commencement of each trial. Each time trial was performed on a VelotronR cycle ergometer with participants being blind to power output, cadence and other feedback except for distance covered.Participants were allowed to self-select their gears and free to change gears during the time trials. Power output (W) was monitored continuously during all trials. Descriptive statistics are represented as mean ± SD and differences between the interventions are specified as standardized mean difference ± 90% confidence limits. Results: There was no substantial ergogenic effect of quinine on 3 km TT cycling performance. Mean power output for all four conditions wassimilar: 348 ± 45 W (water), 354 ± 47 W (quinine1); 355 ± 47 W (sweet), and 355 ± 48 (quinine2). Quinine administration increased power output during the first km by ~18 ± 9 W over water, followed by a decay in power output in the final stages. Discussion: It appears ingesting 2mM of quinine improves cycling performance during the first 1/3 of a 3 km TT but there is also a greater decay in power output during the rest of the TT. Quinine does not appear to improve an individual 3 km performance and might only be useful for short-term (~30s) efforts. The elevated power output during 1st km could be exploited in the team pursuit event by supplementing the lead-off rider.

M3 - Abstract

SP - 304

EP - 305

ER -

ETXEBARRIA N, Ross MLR, Clark B, Burke LM. A novel bitter solution can increase short-term power output in a 3 km cycling time-trial. 2017. Abstract from Annual Congress of the European-College-of-Sport-Sciences, .