Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans
Background: There is limited information on the effects of sports drinks on cognitive function after exercise in the heat. We aimed to investigate the effects of ingesting a commercially available carbohydrate-electrolyte (CHO) solution on cognitive performance following exercise-induced hyperther...
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sg-ntu-dr.10356-1066182022-02-16T16:26:16Z Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans Lee, Jason KW Ang, Wee Hon Ng, Jonathan WX Fan, Priscilla WP Teo, Ya Shi Nolte, Heinrich W Yeo, Yvonne YW Lee Kong Chian School of Medicine (LKCMedicine) DRNTU::Science::Medicine DRNTU::Science::Biological sciences::Human anatomy and physiology Background: There is limited information on the effects of sports drinks on cognitive function after exercise in the heat. We aimed to investigate the effects of ingesting a commercially available carbohydrate-electrolyte (CHO) solution on cognitive performance following exercise-induced hyperthermia. Methods: Twelve participants completed three practices of cognitive tests, one full familiarisation and two experimental trials in an environmental chamber (dry bulb temperature: 30.2 ± 0.3°C, relative humidity: 70 ± 3%). The experimental trials consisted of five cognitive tests (symbol digit matching, search and memory, digit span, choice reaction time and psychomotor vigilance test) performed before and after a 75-min run on a treadmill at 70% VO2 max. One ml/kg body mass of a 6.8% CHO solution or placebo was consumed at the start, every 15 min during exercise and between cognitive tests after exercise. Core temperature, heart rate, blood glucose concentrations, subjective ratings and cognitive performance were assessed (symbol digit matching, search and memory, digit span, choice reaction time and psychomotor vigilance). Results: Participants were hyperthermic at the end of the run (placebo: 39.5 ± 0.4°C, CHO: 39.6 ± 0.5°C; Mean ± SD; p = 0.37). The change in blood glucose was higher with CHO ingestion (1.6, 0.7 to 4.5 mmol/L) (median, range) than with placebo ingestion (0.9, -0.1 to 4.7 mmol/L; p < 0.05). CHO ingestion reduced the maximum span of digits memorized, in contrast to an increase in maximum span with placebo ingestion (p < 0.05). CHO solution had no effect on other cognitive tests (p > 0.05). Conclusions: These results suggest that CHO solution ingestion may impair short-term memory following exertional heat stress. Published version 2015-02-02T02:19:43Z 2019-12-06T22:15:00Z 2015-02-02T02:19:43Z 2019-12-06T22:15:00Z 2014 2014 Journal Article Lee, J. K., Ang, W. H., Ng, J. W., Fan, P. W., Teo, Y. S., Nolte, H. W., et al. (2014). Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans. Journal of the International society of sports nutrition, 11(51). 1550-2783 https://hdl.handle.net/10356/106618 http://hdl.handle.net/10220/24991 10.1186/s12970-014-0051-x 25379031 en Journal of the International society of sports nutrition © 2014 Lee et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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. application/pdf |
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DRNTU::Science::Medicine DRNTU::Science::Biological sciences::Human anatomy and physiology Lee, Jason KW Ang, Wee Hon Ng, Jonathan WX Fan, Priscilla WP Teo, Ya Shi Nolte, Heinrich W Yeo, Yvonne YW Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
description |
Background: There is limited information on the effects of sports drinks on cognitive function after exercise in the
heat. We aimed to investigate the effects of ingesting a commercially available carbohydrate-electrolyte (CHO) solution
on cognitive performance following exercise-induced hyperthermia.
Methods: Twelve participants completed three practices of cognitive tests, one full familiarisation and two experimental
trials in an environmental chamber (dry bulb temperature: 30.2 ± 0.3°C, relative humidity: 70 ± 3%). The experimental
trials consisted of five cognitive tests (symbol digit matching, search and memory, digit span, choice reaction time and
psychomotor vigilance test) performed before and after a 75-min run on a treadmill at 70% VO2 max. One ml/kg body
mass of a 6.8% CHO solution or placebo was consumed at the start, every 15 min during exercise and between cognitive
tests after exercise. Core temperature, heart rate, blood glucose concentrations, subjective ratings and cognitive
performance were assessed (symbol digit matching, search and memory, digit span, choice reaction time and
psychomotor vigilance).
Results: Participants were hyperthermic at the end of the run (placebo: 39.5 ± 0.4°C, CHO: 39.6 ± 0.5°C; Mean ± SD;
p = 0.37). The change in blood glucose was higher with CHO ingestion (1.6, 0.7 to 4.5 mmol/L) (median, range) than
with placebo ingestion (0.9, -0.1 to 4.7 mmol/L; p < 0.05). CHO ingestion reduced the maximum span of digits
memorized, in contrast to an increase in maximum span with placebo ingestion (p < 0.05). CHO solution had
no effect on other cognitive tests (p > 0.05).
Conclusions: These results suggest that CHO solution ingestion may impair short-term memory following exertional
heat stress. |
author2 |
Lee Kong Chian School of Medicine (LKCMedicine) |
author_facet |
Lee Kong Chian School of Medicine (LKCMedicine) Lee, Jason KW Ang, Wee Hon Ng, Jonathan WX Fan, Priscilla WP Teo, Ya Shi Nolte, Heinrich W Yeo, Yvonne YW |
format |
Article |
author |
Lee, Jason KW Ang, Wee Hon Ng, Jonathan WX Fan, Priscilla WP Teo, Ya Shi Nolte, Heinrich W Yeo, Yvonne YW |
author_sort |
Lee, Jason KW |
title |
Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
title_short |
Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
title_full |
Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
title_fullStr |
Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
title_full_unstemmed |
Effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
title_sort |
effects of a carbohydrate-electrolyte solution on cognitive performance following exercise-induced hyperthermia in humans |
publishDate |
2015 |
url |
https://hdl.handle.net/10356/106618 http://hdl.handle.net/10220/24991 |
_version_ |
1725985604041179136 |