Navigation Links
Large Fluid Intake Won’t Help to Keep Cool for Marathon Runner

Gulping down several litres of water to keep oneself cool may not be a best option, as large fluid intake won’t make much difference, warns scientists for marathon runners//.

With today's temperatures expected to reach 19 degrees, the average runner will potentially lose almost a litre of sweat every hour and reach a body temperature of over 39 degrees, two degrees above normal. The sporting community has long assumed that drinking large amounts of water helps to keep the body's temperature down, which improves performance. A recent study led by Dr Chris Byrne of the University of Exeter shows that the level of fluid intake has absolutely no effect on body temperature or performance.

Dr Chris Byrne, sport scientist from the University of Exeter said: 'We'll see many of today's Marathon runners clutching bottles of water. The conventional view among both scientists and the fitness media is that fully replacing sweat losses by fluid intake during exercise will reduce an athlete's body temperature and improve performance. Our research, which for the first time measured internal body temperature continuously during an actual race, revealed no evidence that fluid intake makes runners cooler or improves performance.'

Dr Byrne and his team monitored a group of male runners taking part in the Singapore Army Half-Marathon, a 21km race that took place in temperatures between 26 and 29 degrees Celsius and 75-90% relative humidity. The night before the race, the runners ingested telemetric temperature sensors, which contain temperature-sensitive quartz crystal oscillators that vibrate at a frequency relative to its surrounding temperature and communicate the temperature by radio wave to a recording device worn by the runner. For previous studies, body temperatures have been taken after races, but this was the first time that researchers have monitored body temperatures continuously throughout a race.

Over half the runners reached body te mperatures exceeding 40 degrees and all lost an average of 1.5 litres of sweat per hour. Runners replaced between 6% and 73% of their sweat losses during the race. There was no relationship between the amount of fluid each runner consumed, his body temperature and overall performance in the race. The highest body temperature observed (41.7°C) was recorded from a runner replacing the greatest amount of his sweat losses (73%) and therefore being the least dehydrated of the study sample.

Dr Byrne concludes: 'I would encourage those people taking part in today's Marathon to be well hydrated before the race, but not to feel they need to drink water throughout the event. Listen to your body and drink if you feel thirsty, but drinking several litres of water will not help you run any faster.'


Related medicine news :

1. The Link Between Larger Birth Weight And Cancer Risk
2. Worlds Largest Cord Blood Bank to be started in India
3. India Has The Oldest And Largest Collection Of Preserved Mosquitoes – Mosquito Museu
4. Fear Of Dengue Epidemic Looms Large: Fever Kills Five in Pakistan
5. Visualization Found To Be Largely Dependent On The Brain
6. Large Scale Study On H5N1 Conducted
7. Large Scale Multiple Sclerosis Vaccine Trial to Be Initiated By PharmaFrontiers
8. Pre-eclampsia Pronounced With Intake of Vitamins in Large Doses
9. Large Ambulances To Handle Obese patients In Vegas
10. Heart Related Problems-The Largest Killers In Andhra Pradesh
11. Large scale culling of poultry effected at Cote dIvoire following bird flu outbreak.
Post Your Comments:

(Date:11/29/2015)... ... November 29, 2015 , ... Khanna Vision Institute based ... of Ophthalmology on November 25th 2015. Peer Certification by the Board is done ... specialty. Certification in Ophthalmology is first obtained after the completion of three years of ...
(Date:11/29/2015)... ... November 29, 2015 , ... Key Housing, a top-rated corporate housing service for ... featured apartment community: Epic. In showcasing this featured apartment community in San Jose, Key ... rental market to efficiently find housing suitable to their needs by showcasing quality housing. ...
(Date:11/28/2015)... ... November 28, 2015 , ... Pixel Film Studios is back again with ... the possibilities are endless. Users have full control over angle of view, speed method, ... users are sure to get heads to turn. , ProPanel: Pulse offers fully customizable ...
(Date:11/27/2015)... ... , ... The rapid speed at which Americans are aging ... is needed, especially with Alzheimer’s, dementia and other cognitive conditions becoming more prevalent. ... part of this equation: 80 percent of medical care occurs in the home, ...
(Date:11/27/2015)... ... ... The print component of “Supporting Our Caregivers” is distributed ... Minneapolis, South Florida, with a circulation of approximately 250,000 copies and an estimated ... media strategy and across a network of top news sites and partner media ...
Breaking Medicine News(10 mins):
(Date:11/26/2015)... 26, 2015 ... ser potential att använda SyMRI för att ... för patienter med multipel skleros (MS) eller ... SyntheticMR AB för att kunna använda SyMRI ... Med SyMRI kan man generera flera konstrastbilder ...
(Date:11/26/2015)... , November 26, 2015 /PRNewswire/ ... --> adds "Global ... and "Investigation Report on China Repaglinide ... 2021 forecasts data and information to ... . --> ...
(Date:11/26/2015)... , November 26, 2015 ... addition of the "Radioimmunoassay Market by ... (Hospital, Pharmaceutical Industry, Academics, Clinical Diagnostic Labs), ... Global Forecast to 2020" report to ... has announced the addition of the ...
Breaking Medicine Technology: