Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat
Purpose: The purpose of this study was to examine the effects of pre-cooling and fluid replacement with either crushed ice or cold water. Methods: On 2 separate occasions, in a counterbalanced order, 9 recreationally-trained males ingested 1.25 g/kg (80–100 g) of either crushed ice (0.5°C) or cold w...
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doaj-5f291b88575240558ada0e8bc4ddf8672020-11-24T23:21:11ZengElsevierJournal of Sport and Health Science2095-25462017-03-016111111710.1016/j.jshs.2015.12.002Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heatTakashi NaitoTetsuro OgakiPurpose: The purpose of this study was to examine the effects of pre-cooling and fluid replacement with either crushed ice or cold water. Methods: On 2 separate occasions, in a counterbalanced order, 9 recreationally-trained males ingested 1.25 g/kg (80–100 g) of either crushed ice (0.5°C) or cold water (4°C) every 5 min for 30 min before exercise. They also ingested 2.0 g/kg (130–160 g) of the same treatment drink at 15 min, 30 min, and 45 min after the commencement of cycling to exhaustion at 60%VO2max until voluntary exhaustion in a hot environment (35°C and 30% relative humidity). Results: The cycling time to exhaustion in the crushed ice trial (50.0 ± 12.2 min) was longer than the cold water trial (42.2 ± 10.1 min; p = 0.02). Although the rectal temperature fell by 0.37°C ± 0.03°C (p = 0.01) at the end of the resting period after the crushed ice ingestion, the rates of rise in rectal temperature during the exercise period were not significantly different between these 2 conditions (crushed ice: 0.23°C ± 0.07°C, 5 min; cold water: 0.22°C ± 0.07°C, 5 min; p = 0.94). Conclusion: Crushed ice ingestion before and during exercise in a hot environment may be a preferred and effective approach for minimizing thermal strain, and for improving endurance performance as compared with cold water ingestion.http://www.sciencedirect.com/science/article/pii/S2095254615001258Cold water ingestionPre-coolingRectal temperatureThermoregulation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Takashi Naito Tetsuro Ogaki |
spellingShingle |
Takashi Naito Tetsuro Ogaki Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat Journal of Sport and Health Science Cold water ingestion Pre-cooling Rectal temperature Thermoregulation |
author_facet |
Takashi Naito Tetsuro Ogaki |
author_sort |
Takashi Naito |
title |
Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
title_short |
Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
title_full |
Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
title_fullStr |
Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
title_full_unstemmed |
Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
title_sort |
comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat |
publisher |
Elsevier |
series |
Journal of Sport and Health Science |
issn |
2095-2546 |
publishDate |
2017-03-01 |
description |
Purpose: The purpose of this study was to examine the effects of pre-cooling and fluid replacement with either crushed ice or cold water.
Methods: On 2 separate occasions, in a counterbalanced order, 9 recreationally-trained males ingested 1.25 g/kg (80–100 g) of either crushed ice (0.5°C) or cold water (4°C) every 5 min for 30 min before exercise. They also ingested 2.0 g/kg (130–160 g) of the same treatment drink at 15 min, 30 min, and 45 min after the commencement of cycling to exhaustion at 60%VO2max until voluntary exhaustion in a hot environment (35°C and 30% relative humidity).
Results: The cycling time to exhaustion in the crushed ice trial (50.0 ± 12.2 min) was longer than the cold water trial (42.2 ± 10.1 min; p = 0.02). Although the rectal temperature fell by 0.37°C ± 0.03°C (p = 0.01) at the end of the resting period after the crushed ice ingestion, the rates of rise in rectal temperature during the exercise period were not significantly different between these 2 conditions (crushed ice: 0.23°C ± 0.07°C, 5 min; cold water: 0.22°C ± 0.07°C, 5 min; p = 0.94).
Conclusion: Crushed ice ingestion before and during exercise in a hot environment may be a preferred and effective approach for minimizing thermal strain, and for improving endurance performance as compared with cold water ingestion. |
topic |
Cold water ingestion Pre-cooling Rectal temperature Thermoregulation |
url |
http://www.sciencedirect.com/science/article/pii/S2095254615001258 |
work_keys_str_mv |
AT takashinaito comparisonoftheeffectsofcoldwaterandiceingestiononendurancecyclingcapacityintheheat AT tetsuroogaki comparisonoftheeffectsofcoldwaterandiceingestiononendurancecyclingcapacityintheheat |
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