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The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance

BACKGROUND: The purpose of this study was to examine the ergogenic benefits of Turkish coffee consumed an hour before exercise. In addition, metabolic, cardiovascular, and subjective measures of energy, focus and alertness were examined in healthy, recreationally active adults who were regular caffe...

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Autores principales: Church, David D., Hoffman, Jay R., LaMonica, Michael B., Riffe, Joshua J., Hoffman, Mattan W., Baker, Kayla M., Varanoske, Alyssa N., Wells, Adam J., Fukuda, David H., Stout, Jeffrey R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4595106/
https://www.ncbi.nlm.nih.gov/pubmed/26445565
http://dx.doi.org/10.1186/s12970-015-0098-3
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author Church, David D.
Hoffman, Jay R.
LaMonica, Michael B.
Riffe, Joshua J.
Hoffman, Mattan W.
Baker, Kayla M.
Varanoske, Alyssa N.
Wells, Adam J.
Fukuda, David H.
Stout, Jeffrey R.
author_facet Church, David D.
Hoffman, Jay R.
LaMonica, Michael B.
Riffe, Joshua J.
Hoffman, Mattan W.
Baker, Kayla M.
Varanoske, Alyssa N.
Wells, Adam J.
Fukuda, David H.
Stout, Jeffrey R.
author_sort Church, David D.
collection PubMed
description BACKGROUND: The purpose of this study was to examine the ergogenic benefits of Turkish coffee consumed an hour before exercise. In addition, metabolic, cardiovascular, and subjective measures of energy, focus and alertness were examined in healthy, recreationally active adults who were regular caffeine consumers (>200 mg per day). METHODS: Twenty males (n = 10) and females (n = 10), age 24.1 ± 2.9 y; height 1.70 ± 0.09 m; body mass 73.0 ± 13.0 kg (mean ± SD), ingested both Turkish coffee [3 mg · kg(−1) BW of caffeine, (TC)], and decaffeinated Turkish coffee (DC) in a double-blind, randomized, cross-over design. Performance measures included a 5 km time trial, upper and lower body reaction to visual stimuli, and multiple object tracking. Plasma caffeine concentrations, blood pressure (BP), heart rate and subjective measures of energy, focus and alertness were assessed at baseline (BL), 30-min following coffee ingestion (30+), prior to endurance exercise (PRE) and immediately-post 5 km (IP). Metabolic measures [VO(2), V(E), and respiratory exchange rate (RER)] were measured during the 5 km. RESULTS: Plasma caffeine concentrations were significantly greater during TC (p < 0.001) at 30+, PRE, and IP compared to DC. Significantly higher energy levels were reported at 30+ and PRE for TC compared to DC. Upper body reaction performance (p = 0.023) and RER (p = 0.019) were significantly higher for TC (85.1 ± 11.6 “hits,” and 0.98 ± 0.05 respectively) compared to DC (81.2 ± 13.7 “hits,” and 0.96 ± 0.05, respectively). Although no significant differences (p = 0.192) were observed in 5 km run time, 12 of the 20 subjects ran faster (p = 0.012) during TC (1662 ± 252 s) compared to DC (1743 ± 296 s). Systolic BP was significantly elevated during TC in comparison to DC. No other differences (p > 0.05) were noted in any of the other performance or metabolic measures. CONCLUSIONS: Acute ingestion of TC resulted in a significant elevation in plasma caffeine concentrations within 30-min of consumption. TC ingestion resulted in significant performance benefits in reaction time and an increase in subjective feelings of energy in habitual caffeine users. No significant differences were noted in time for the 5 km between trials, however 60 % of the participants performed the 5 km faster during the TC trial and were deemed responders. When comparing TC to DC in responders only, significantly faster times were noted when consuming TC compared to DC. No significant benefits were noted in measures of cognitive function.
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spelling pubmed-45951062015-10-07 The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance Church, David D. Hoffman, Jay R. LaMonica, Michael B. Riffe, Joshua J. Hoffman, Mattan W. Baker, Kayla M. Varanoske, Alyssa N. Wells, Adam J. Fukuda, David H. Stout, Jeffrey R. J Int Soc Sports Nutr Research Article BACKGROUND: The purpose of this study was to examine the ergogenic benefits of Turkish coffee consumed an hour before exercise. In addition, metabolic, cardiovascular, and subjective measures of energy, focus and alertness were examined in healthy, recreationally active adults who were regular caffeine consumers (>200 mg per day). METHODS: Twenty males (n = 10) and females (n = 10), age 24.1 ± 2.9 y; height 1.70 ± 0.09 m; body mass 73.0 ± 13.0 kg (mean ± SD), ingested both Turkish coffee [3 mg · kg(−1) BW of caffeine, (TC)], and decaffeinated Turkish coffee (DC) in a double-blind, randomized, cross-over design. Performance measures included a 5 km time trial, upper and lower body reaction to visual stimuli, and multiple object tracking. Plasma caffeine concentrations, blood pressure (BP), heart rate and subjective measures of energy, focus and alertness were assessed at baseline (BL), 30-min following coffee ingestion (30+), prior to endurance exercise (PRE) and immediately-post 5 km (IP). Metabolic measures [VO(2), V(E), and respiratory exchange rate (RER)] were measured during the 5 km. RESULTS: Plasma caffeine concentrations were significantly greater during TC (p < 0.001) at 30+, PRE, and IP compared to DC. Significantly higher energy levels were reported at 30+ and PRE for TC compared to DC. Upper body reaction performance (p = 0.023) and RER (p = 0.019) were significantly higher for TC (85.1 ± 11.6 “hits,” and 0.98 ± 0.05 respectively) compared to DC (81.2 ± 13.7 “hits,” and 0.96 ± 0.05, respectively). Although no significant differences (p = 0.192) were observed in 5 km run time, 12 of the 20 subjects ran faster (p = 0.012) during TC (1662 ± 252 s) compared to DC (1743 ± 296 s). Systolic BP was significantly elevated during TC in comparison to DC. No other differences (p > 0.05) were noted in any of the other performance or metabolic measures. CONCLUSIONS: Acute ingestion of TC resulted in a significant elevation in plasma caffeine concentrations within 30-min of consumption. TC ingestion resulted in significant performance benefits in reaction time and an increase in subjective feelings of energy in habitual caffeine users. No significant differences were noted in time for the 5 km between trials, however 60 % of the participants performed the 5 km faster during the TC trial and were deemed responders. When comparing TC to DC in responders only, significantly faster times were noted when consuming TC compared to DC. No significant benefits were noted in measures of cognitive function. BioMed Central 2015-10-06 /pmc/articles/PMC4595106/ /pubmed/26445565 http://dx.doi.org/10.1186/s12970-015-0098-3 Text en © Church et al. 2015 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
spellingShingle Research Article
Church, David D.
Hoffman, Jay R.
LaMonica, Michael B.
Riffe, Joshua J.
Hoffman, Mattan W.
Baker, Kayla M.
Varanoske, Alyssa N.
Wells, Adam J.
Fukuda, David H.
Stout, Jeffrey R.
The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title_full The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title_fullStr The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title_full_unstemmed The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title_short The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance
title_sort effect of an acute ingestion of turkish coffee on reaction time and time trial performance
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4595106/
https://www.ncbi.nlm.nih.gov/pubmed/26445565
http://dx.doi.org/10.1186/s12970-015-0098-3
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