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Nutrients
Volume 13
Issue 4
10.3390/nu13041374
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Article

Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners

by
Juthamard Surapongchai
1,*,
Vitoon Saengsirisuwan
2,
Ian Rollo
3,4,
Rebecca K. Randell
3,4,
Kanpiraya Nithitsuttibuta
2,
Patarawadee Sainiyom
2,
Clarence Hong Wei Leow
5 and
Jason Kai Wei Lee
5,6,7,8,9,10
1
Faculty of Physical Therapy, Mahidol University, Nakhon Pathom 73170, Thailand
2
Department of Physiology, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
3
Gatorade Sports Science Institute, PepsiCo Life Sciences, Global R&D, Leicestershire LE4 1ET, UK
4
School of Sport, Exercise and Health Sciences, Loughborough University, Leicestershire LE11 3TU, UK
5
Human Potential Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119283, Singapore
6
Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
7
N.1 Institute for Health, National University of Singapore, Singapore 117456, Singapore
8
Global Asia Institute, National University of Singapore, Singapore 119076, Singapore
9
Institute for Digital Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117456, Singapore
10
Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (A*STAR), Singapore 117609, Singapore
*
Author to whom correspondence should be addressed.
Nutrients 2021, 13(4), 1374; https://doi.org/10.3390/nu13041374
Submission received: 21 February 2021 / Revised: 1 April 2021 / Accepted: 15 April 2021 / Published: 20 April 2021
(This article belongs to the Special Issue Hydration and Fluid Needs during Physical Activity)
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Abstract

Aim: The purpose of this study was to evaluate hydration status, fluid intake, sweat rate, and sweat sodium concentration in recreational tropical native runners. Methods: A total of 102 males and 64 females participated in this study. Participants ran at their self-selected pace for 30–100 min. Age, environmental conditions, running profiles, sweat rates, and sweat sodium data were recorded. Differences in age, running duration, distance and pace, and physiological changes between sexes were analysed. A p-value cut-off of 0.05 depicted statistical significance. Results: Males had lower relative fluid intake (6 ± 6 vs. 8 ± 7 mL·kg−1·h−1, p < 0.05) and greater relative fluid balance deficit (−13 ± 8 mL·kg−1·h−1 vs. −8 ± 7 mL·kg−1·h−1, p < 0.05) than females. Males had higher whole-body sweat rates (1.3 ± 0.5 L·h−1 vs. 0.9 ± 0.3 L·h−1, p < 0.05) than females. Mean rates of sweat sodium loss (54 ± 27 vs. 39 ± 22 mmol·h−1) were higher in males than females (p < 0.05). Conclusions: The sweat profile and composition in tropical native runners are similar to reported values in the literature. The current fluid replacement guidelines pertaining to volume and electrolyte replacement are applicable to tropical native runners.
Keywords: recreational running; tropical climate; sweat electrolyte; fluid replacement; hydration plan recreational running; tropical climate; sweat electrolyte; fluid replacement; hydration plan

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MDPI and ACS Style

Surapongchai, J.; Saengsirisuwan, V.; Rollo, I.; Randell, R.K.; Nithitsuttibuta, K.; Sainiyom, P.; Leow, C.H.W.; Lee, J.K.W. Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners. Nutrients 2021, 13, 1374. https://doi.org/10.3390/nu13041374

AMA Style

Surapongchai J, Saengsirisuwan V, Rollo I, Randell RK, Nithitsuttibuta K, Sainiyom P, Leow CHW, Lee JKW. Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners. Nutrients. 2021; 13(4):1374. https://doi.org/10.3390/nu13041374

Chicago/Turabian Style

Surapongchai, Juthamard, Vitoon Saengsirisuwan, Ian Rollo, Rebecca K. Randell, Kanpiraya Nithitsuttibuta, Patarawadee Sainiyom, Clarence Hong Wei Leow, and Jason Kai Wei Lee. 2021. "Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners" Nutrients 13, no. 4: 1374. https://doi.org/10.3390/nu13041374

APA Style

Surapongchai, J., Saengsirisuwan, V., Rollo, I., Randell, R. K., Nithitsuttibuta, K., Sainiyom, P., Leow, C. H. W., & Lee, J. K. W. (2021). Hydration Status, Fluid Intake, Sweat Rate, and Sweat Sodium Concentration in Recreational Tropical Native Runners. Nutrients, 13(4), 1374. https://doi.org/10.3390/nu13041374

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