HOME >> BIOLOGY >> NEWS
UCSF study finds danger in marathon runners drinking too much water

Drinking too much water while running a marathon can kill you. That may sound like a rumor passed around on the Internet, but it does happen in some cases. Now researchers at the University of California, San Francisco think they know why. The excess water can help to cause the brain to swell, and fluid to leak into the lungs, either of which can be fatal. They confirm that the cure is a simple intravenous dose of salt water. The findings are published in the May 2 issue of the Archives of Internal Medicine.

Although marathon runners need to keep hydrated, in the last decade physicians have come to realize that a few hours of sweating away water and salt, but drinking only water, could put some runners into a danger zone known as hyponatremia. It was found that some runners who collapsed and died during a marathon had lost the normally well-balanced ratios of salt and water -- they had plenty of water, but far too little salt.

To understand how this might kill some runners, Allen Arieff, MD, a UCSF professor of medicine at the Veterans Affairs Medical Center in San Francisco, and two colleagues at Baylor College of Medicine, treated, or consulted on the cases of, seven athletes who suffered hyponatremia while running a marathon. They had all been nauseous, vomiting, or confused at some point during their run. Six of the seven patients survived after intravenous treatment with a high salt solution.

All the patients share several characteristics, which provide clues about the mechanisms of hyponatremia, Arieff said. In addition to having fluid in their lungs -- a hallmark of hyponatremia -- the patients all had low levels of sodium and oxygen in their blood. X-rays of six of the patients showed that they had significant brain swelling.

In the study, Arieff suggests the following mechanism. The body, in an attempt to keep a balance of salt and water levels between the blood and tissues, begins to draw water out of the blood, leading
'"/>

Contact: Kevin Boyd
kboyd@pubaff.ucsf.edu
415-476-2557
University of California - San Francisco
1-May-2000


Page: 1 2 3

Related biology news :

1. Student science contest participation influences study, career choices, alumni say
2. New study shows hope for treating inhalant abuse
3. International study findings link acne-like rash to effectiveness of new targeted cancer treatment
4. Cigarette smoke causes breaks in DNA and defects to a cells chromosomes, Pitt study finds
5. New study indicates arsenic could be suitable as first-line treatment in type of leukaemia
6. Phase II trials of second-generation antisense cancer drug planned following successful early study
7. Preclinical safety study shows adipose-derived stem cells improve heart function after heart attack
8. Indiana University, EPA to study airborne PCBs
9. K-State, other universities to study how climate affects plant evolution
10. USC study links historical increases in life span to lower childhood exposure to infection
11. Washington University in St. Louis leads group studying aging process

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/27/2017)... ROCKVILLE CENTRE, N.Y. , March 27, 2017 ... by Healthcare Information and Management Systems Society (HIMSS) ... Analytics Outpatient EMR Adoption Model sm . In ... top 12% of U.S. hospitals using an electronic ... recognized CHS for its high level of EMR ...
(Date:3/23/2017)... 23, 2017 The report "Gesture Recognition and Touchless Sensing ... Geography - Global Forecast to 2022", published by MarketsandMarkets, the market is expected ... 29.63% between 2017 and 2022. Continue Reading ... ... ...
(Date:3/22/2017)... March 21, 2017 Optimove , ... by retailers such as 1-800-Flowers and AdoreMe, today ... Recommendations and Replenishment. Using Optimove,s machine learning algorithms, ... product and replenishment recommendations to their customers based ... predictions of customer intent drawn from a complex ...
Breaking Biology News(10 mins):
(Date:8/15/2017)... ... August 15, 2017 , ... Kenall, ... modular downlights designed to stay tightly sealed and perform efficiently for years. The ... wet location listings just aren't enough, such as: hospitals; behavioral health facilities; cleanrooms; ...
(Date:8/14/2017)... Portland, Oregon (PRWEB) , ... August 14, 2017 ... ... modules that provide essential device-to-computer interconnect using USB or PCI Express, announced the ... hardware. , SYZYGY is intended to satisfy the need for a compact, low ...
(Date:8/11/2017)... Wauwatosa, WI (PRWEB) , ... August 11, 2017 ... ... transparency in food production, and, in particular, more natural alternatives to synthetic ingredients,” ... and innovation of Third Wave, with the established manufacturing presence and know-how of ...
(Date:8/10/2017)... ... August 09, 2017 , ... Okyanos Center for Regenerative Medicine ... the Pelican Bay Hotel in Freeport, Grand Bahama on September 27, 2017. This daytime ... , With oversight from the Ministry of Health’s National Stem Cell Ethics Committee (NSCEC) ...
Breaking Biology Technology:
Cached News: