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Author Topic: Cold water in the mouth might help MS heat sensitivity, study shows  (Read 71 times)

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Offline agate

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Cold water in the mouth might help MS heat sensitivity, study shows
« on: December 15, 2017, 09:27:30 am »
This abstract from PubMed was cited in an article  in the MS International Federation Research News (December 2017):

http://Med Sci Sports Exerc. 2017 Nov 15.

[color=teal]Cold-Water Ingestion Improves Exercise Tolerance of Heat-Sensitive People with MS[/color]

Chaseling GK1, Filingeri D, Barnett M, Hoang P, Davis SL, Jay O.

[b]Author information[/b]

1Thermal Ergonomics Laboratory, Faculty of Health Sciences, University of Sydney, Lidcombe NSW, Australia; 2Environmental Ergonomics Research Centre, Loughborough University, Leicestershire, United Kingdom; 3Brain and Mind Research Centre, Sydney Medical School, University of Sydney, Camperdown, NSW, Australia; 4Neuroscience Research Australia, Sydney, NSW, Australia; 5Applied Physiology & Wellness Southern Methodist University, Dallas, TX; 6Neurology and Neurotherapeutics, University of Texas Southwestern Medical Center, Dallas, TX; 7Charles Perkins Centre, University of Sydney, Camperdown, NSW, Australia.

[b]PURPOSE:[/b]

Heat intolerance commonly affects the exercise capacity of people with multiple sclerosis (MS) during bouts of hot weather. Cold-water ingestion is a simple cooling strategy but its efficacy for prolonging exercise capacity with MS remains undetermined. We sought to identify whether cold-water ingestion blunts exercise-induced rises in body temperature and improves exercise tolerance in heat-sensitive individuals with MS.

[b]METHODS:[/b]

On two separate occasions, 20 participants (10 relapsing-remitting MS (EDSS: 1-5); 10 age-matched healthy controls (CON)) cycled at ~40% VO2max at 30°C, 30%RH until volitional exhaustion (or a maximum of 60 min). Every 15 minutes, participants ingested 3.2 mL·kg of either 1.5°C (CLD) or 37°C (NEU) water. Rectal (Tre) temperature, mean skin (Tsk) temperature, and heart rate (HR) were measured throughout.

[b]RESULTS:[/b]

All 10 CON, but only 3 of 10 MS participants completed 60 minutes of exercise in NEU trial. The remaining 7 MS participants all cycled longer (P=0.006) in CLD (46.4±14.2 min) compared to NEU (32.7±11.5 min), despite a similar absolute Tre (NEU: 37.32±0.34°C; CLD: 37.28±0.26°C; P=0.44), change in Tre (NEU: 0.38±0.21°C; CLD: 0.34±0.24°C), absolute Tsk (NEU: 34.48±0.47°C; CLD: 34.44±0.54°C; P=0.82) and HR (NEU: 114±20 beats·min; CLD: 113±18 beats·min; P=0.38) for the same exercise volume.

[b]CONCLUSIONS:[/b]

Cold-water ingestion enhanced exercise tolerance of MS participants in the heat by ~30% despite no differences in core and mean skin temperatures or heart rate. These findings support the use of a simple cooling strategy for mitigating heat intolerance with MS, and lend insight into the potential role of cold-afferent thermoreceptors that reside in the abdomen and oral cavity in the modulation of exercise tolerance with MS in the heat.

https://www.ncbi.nlm.nih.gov/pubmed/29140896

"New study shows cold water in the mouth can help heat sensitivity in MS" (MS International Federation Research News)
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