Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/182035
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dc.titleAre we being drowned in hydration advice? Thirsty for more?
dc.contributor.authorCotter, J.D
dc.contributor.authorThornton, S.N
dc.contributor.authorLee, J.K.W
dc.contributor.authorLaursen, P.B
dc.date.accessioned2020-10-30T01:58:00Z
dc.date.available2020-10-30T01:58:00Z
dc.date.issued2014
dc.identifier.citationCotter, J.D, Thornton, S.N, Lee, J.K.W, Laursen, P.B (2014). Are we being drowned in hydration advice? Thirsty for more?. Extreme Physiology and Medicine 3 (1) : Jan-16. ScholarBank@NUS Repository.
dc.identifier.issn20467648
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/182035
dc.description.abstractHydration pertains simplistically to body water volume. Functionally, however, hydration is one aspect of fluid regulation that is far more complex, as it involves the homeostatic regulation of total body fluid volume, composition and distribution. Deliberate or pathological alteration of these regulated factors can be disabling or fatal, whereas they are impacted by exercise and by all environmental stressors (e.g. heat, immersion, gravity) both acutely and chronically. For example, dehydration during exercising and environmental heat stress reduces water volume more than electrolyte content, causing hyperosmotic hypohydration. If exercise continues for many hours with access to food and water, composition returns to normal but extracellular volume increases well above baseline (if exercising upright and at low altitude). Repeating bouts of exercise or heat stress does likewise. Dehydration due to physical activity or environmental heat is a routine fluid-regulatory stress. How to gauge such dehydration and- more importantly-what to do about it, are contested heavily within sports medicine and nutrition. Drinking to limit changes in body mass is commonly advocated (to maintain ?2% reduction), rather than relying on behavioural cues (mainly thirst) because the latter has been deemed too insensitive. This review, as part of the series on moving in extreme environments, critiques the validity, problems and merits of externally versus autonomously controlled fluid-regulatory behaviours, both acutely and chronically. Our contention is that externally advocated hydration policies (especially based on change in body mass with exercise in healthy individuals) have limited merit and are extrapolated and imposed too widely upon society, at the expense of autonomy. More research is warranted to examine whether ad libitum versus avid drinking is beneficial, detrimental or neither in: acute settings; adapting for obligatory dehydration (e.g. elite endurance competition in the heat), and; development of chronic diseases that are associated with an extreme lack of environmental stress. © 2014 Cotter et al.; licensee BioMed Central Ltd.
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceUnpaywall 20201031
dc.subjectbody distribution
dc.subjectbody mass
dc.subjectcardiovascular disease
dc.subjectchronic kidney disease
dc.subjectcognition
dc.subjectdrowning
dc.subjectenvironmental stress
dc.subjectextracellular space
dc.subjectfaintness
dc.subjectfluid balance
dc.subjectheat stress
dc.subjecthuman
dc.subjecthydration
dc.subjecthyponatremia
dc.subjecthypovolemia
dc.subjectmetabolic disorder
dc.subjectmood
dc.subjectmuscle cramp
dc.subjectnephrolithiasis
dc.subjectoutcome assessment
dc.subjectphysical activity
dc.subjectpriority journal
dc.subjectReview
dc.subjectsports medicine
dc.subjectthirst
dc.subjecttotal body water
dc.subjecturinary tract infection
dc.typeReview
dc.contributor.departmentDEPT OF PHYSIOLOGY
dc.description.sourcetitleExtreme Physiology and Medicine
dc.description.volume3
dc.description.issue1
dc.description.pageJan-16
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