Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5122068 | Journal of Sport and Health Science | 2017 | 7 Pages |
PurposeThe purpose of this study was to examine the effects of pre-cooling and fluid replacement with either crushed ice or cold water.MethodsOn 2 separate occasions, in a counterbalanced order, 9 recreationally-trained males ingested 1.25âg/kg (80-100âg) of either crushed ice (0.5°C) or cold water (4°C) every 5âmin for 30âmin before exercise. They also ingested 2.0âg/kg (130-160âg) of the same treatment drink at 15âmin, 30âmin, and 45âmin after the commencement of cycling to exhaustion at 60%VO2max until voluntary exhaustion in a hot environment (35°C and 30% relative humidity).ResultsThe cycling time to exhaustion in the crushed ice trial (50.0â±â12.2âmin) was longer than the cold water trial (42.2â±â10.1âmin; pâ=â0.02). Although the rectal temperature fell by 0.37°Câ±â0.03°C (pâ=â0.01) 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°Câ±â0.07°C, 5âmin; cold water: 0.22°Câ±â0.07°C, 5âmin; pâ=â0.94).ConclusionCrushed 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.