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:
TAG: UCSF study finds danger marathon runners drinking too much water

(Date:3/19/2015)... 19, 2015  NXT-ID, Inc. (NASDAQ: NXTD ) ... the growing mobile commerce market, announces its biometric payment technology, ... that aired this week on Washington DC,s ... In a segment "The Next Great Thing", host Laura ... to pay, and ,a really big breakthrough in mobile payment.,  ...
(Date:3/16/2015)... Germany , March 16, 2015 ... Identification Systems GmbH will present groundbreaking innovations in ... Hanover, Germany .      ... DERMALOG,s latest biometric innovation is well at the ... next generation e-gate made in Germany ...
(Date:3/11/2015)... and Markets ( http://www.researchandmarkets.com/research/3p32qm/access_control ) has announced ... Product, Application & By Geography - Global Forecast & ... This report predicts that the access control ... with an estimated CAGR of 10.6%. The ... as contact cards & readers, contactless cards & readers, ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 2NXT-ID's Wocket Smart Wallet Featured on Fox News Segment, "The Next Great Thing" 3DERMALOG Presents its Latest Biometric Innovations at the Hannover CeBIT Exhibition, 16 - 20 March 2015 2DERMALOG Presents its Latest Biometric Innovations at the Hannover CeBIT Exhibition, 16 - 20 March 2015 3Global Access Control (Cards & Readers, Biometrics, Controllers, Management Software) Market 2015-2020 - Analysis of the $10 Billion Market 2
(Date:3/31/2015)... March 31, 2015 This June 13th, ... the top U.S and International Medical Schools will come ... research on the application of stem cell therapy in ... is organized and funded by the Ocular Research ... has been convening intimate meetings of top experts in ...
(Date:3/31/2015)... 2015 Lighthouse Information Systems, Inc., ... in California, Oregon, Washington and clients across the ... and Acquisition (M&A) Integration Services offering, effective immediately. ... Services and M&A Integration Practice Leader at Lighthouse, ... majority of M&A initiatives fail to achieve their ...
(Date:3/30/2015)... , March 30, 2015  Multiple new research abstracts ... several important health factors. From their impact on colon ... positive effect on both gut health and vascular health, ... detail our latest understanding of walnuts, inner workings. Running ... , this annual meeting attracts an international audience ...
(Date:3/30/2015)... , March 30, 2015  New Jersey Health ... projects in the state of New Jersey ... round of grant funding, announced James M. Golubieski ... Health Foundation Research Grants program, an additional $500,000 will ... to fund early stage research projects that demonstrate exciting ...
Breaking Biology Technology:Sight Restoration Through Stem Cell Therapy - Subject of June Symposium of Experts 2Lighthouse Information Systems, Inc., Announces Addition of M&A Integration Services 2New Findings Support the Benefits of Eating Walnuts on Overall Health 2New Findings Support the Benefits of Eating Walnuts on Overall Health 3New Findings Support the Benefits of Eating Walnuts on Overall Health 4New Jersey Health Foundation Announces An Additional $1 Million To Fund Innovation and Research Grants in New Jersey 2
Cached News: