简介：

简介：Purpose:Thepurposeofthisstudywastoexaminetheeffectsofpre-coolingandfluidreplacementwitheithercrushediceorcoldwater.Methods:On2separateoccasions,inacounterbalancedorder,9recreationally-trainedmalesingested1.25g/kg（80–100g）ofeithercrushedice（0.5℃）orcoldwater（4℃）every5minfor30minbeforeexercise.Theyalsoingested2.0g/kg（130–160g）ofthesametreatmentdrinkat15min,30min,and45minafterthecommencementofcyclingtoexhaustionat60%VO2maxuntilvoluntaryexhaustioninahotenvironment（35℃and30%relativehumidity）.Results:Thecyclingtimetoexhaustioninthecrushedicetrial（50.0±12.2min）waslongerthanthecoldwatertrial（42.2±10.1min;p=0.02）.Althoughtherectaltemperaturefellby0.37℃±0.03℃（p=0.01）attheendoftherestingperiodafterthecrushediceingestion,theratesofriseinrectaltemperatureduringtheexerciseperiodwerenotsignificantlydifferentbetweenthese2conditions（crushedice:0.23℃±0.07℃,5min;coldwater:0.22℃±0.07℃,5min;p=0.94）.Conclusion:Crushediceingestionbeforeandduringexerciseinahotenvironmentmaybeapreferredandeffectiveapproachforminimizingthermalstrain,andforimprovingenduranceperformanceascomparedwithcoldwateringestion.