Int J Sports Med 2013; 34(12): 1037-1042
DOI: 10.1055/s-0033-1337906
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Cold Drink Attenuates Heat Strain during Work-rest Cycles

J.K. W. Lee
2   Department of Physiology, Yong Loo Lin School of Medicine, National ­University of Singapore, Singapore
Z. W. Yeo
2   Department of Physiology, Yong Loo Lin School of Medicine, National ­University of Singapore, Singapore
A.Q. X. Nio
3   Sport Science and Management, Nanyang Technological University, ­Singapore, Singapore
A.C. H. Koh
2   Department of Physiology, Yong Loo Lin School of Medicine, National ­University of Singapore, Singapore
Y. S. Teo
1   Defence Medical & Environmental Research Institute, DSO National ­Laboratories
L. F. Goh
2   Department of Physiology, Yong Loo Lin School of Medicine, National ­University of Singapore, Singapore
P.M. S. Tan
3   Sport Science and Management, Nanyang Technological University, ­Singapore, Singapore
C. Byrne
4   School of Sport and Health Sciences, University of Exeter, Exeter, United Kingdom
› Author Affiliations
Further Information

Publication History

accepted after revision 27 January 2013

Publication Date:
13 May 2013 (online)


There is limited information on the ingestion of cold drinks after exercise. We investigated the thermoregulatory effects of ingesting drinks at 4°C (COLD) or 28°C (WARM) during work-rest cycles in the heat. On 2 separate occasions, 8 healthy males walked on the treadmill for 2 cycles (45 min work; 15 min rest) at 5.5 km/h with 7.5% gradient. Two aliquots of 400 mL of plain water at either 4°C or 28°C were consumed during each rest period. Rectal temperature (T re ), skin temperature (T sk ), heart rate and subjective ratings were measured. Mean decrease in T re at the end of the final work-rest cycle was greater after the ingestion of COLD drinks (0.5±0.2°C) than WARM drinks (0.3±0.2°C; P<0.05). Rate of decrease in T sk was greater after ingestion of COLD drinks during the first rest period (P<0.01). Mean heart rate was lower after ingesting COLD drinks (P<0.05). Ratings of thermal sensation were lower during the second rest phase after ingestion of COLD drinks (P<0.05). The ingestion of COLD drinks after exercise resulted in a lesser than expected reduction of T re . Nevertheless, the reduction in T re implies a potential for improved work tolerance during military and occupational settings in the heat.

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