Comparison of the Effect of Cold Fluid and Crushed Ice Ingestion on Thermoregulatory Responses during Physical Activity in a Simulated Hot-Humid Environment

Titis Wijayanto; Valentina Kunti Bratadewi; Ghani Furqon Abdul Rahman; Moony Sinawang; Harendra Surya Prakasa

doi:10.7232/iems.2019.18.4.600

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저자정보: Titis Wijayanto (Universitas Gadjah Mada) Valentina Kunti Bratadewi (Universitas Gadjah Mada) Ghani Furqon Abdul Rahman (Universitas Gadjah Mada) Moony Sinawang (Universitas Gadjah Mada) Harendra Surya Prakasa (Universitas Gadjah Mada)

저널정보: 대한산업공학회 Industrial Engineering & Management Systems Industrial Engineering & Management Systems Vol.18 No.4

발행연도: 2019.12

수록면: 600 - 608 (9page)

DOI: 10.7232/iems.2019.18.4.600

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It has been reported that internal precooling via fluid ingestion is useful for hyperthermia prevention during exercise; however, its application in the occupational setting is unclear. This study aims to compare the effect of pre-cooling using cold fluid and crushed ice ingestion on thermoregulatory responses during simulated occupational activity in a hot and humid environment. Nine healthy males completed treadmill exercise for 30-min at an intensity of 65% of predetermined HRmax in a chamber set at 36.6±0.8℃ of air temperature and 72±6% of relative humidity. Before the exercise, they preceded ingested 7.5 ml kg<SUP>-1</SUP> body mass of cold drink (4℃), crushed ice (-2℃), or mineral water (28℃) for pre-cooling. Ingesting crushed ice before the activity significantly lowered the pre-activity tympanic temperature than the cold beverage. Also, crushed ice ingestion showed more significant effects in lowering heart rate and improving heat sink at the post-activity phase compared to cold beverage ingestion. These findings suggest that crushed ice ingestion may be more practical to minimize physiological and subjective thermal strain during occupational activity than ingesting cold fluid.

#Cold Beverage Ingestion #Precooling #Thermoregulation #Physiological Responses

참고문헌 (37)

참고문헌 신청

Barwood, M. J. / 2009 / Post-exercise cooling techniques in hot, humid conditions / European Journal of Applied Physiology 107(4):385~396

Booth, J. / 1997 / Improved running performance in hot humid conditions following whole body precooling / Med Sci Sports Exercise 29(7):943~949

Bruce, R. A. / 1974 / Methods of exercise testing : Step test, bicycle, treadmill, isometrics / The American Journal of Cardiology 33(6):715~720

Burdon, C. A. / 2010 / Influence of beverage temperature on exercise performance in the heat : A systematic review / International Journal of Sport Nutrition and Exercise Metabolism 20(2):166~174

DeGroot, D. W. / 2013 / Extremity cooling for heat stress mitigation in military and occupational settings / Journal of Thermal Biology 38(6):305~310

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