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:1/21/2016)... 2016 --> ... research report "Emotion Detection and Recognition Market by Technology (Bio-Sensors, ... Expression, Voice Recognition and Others), Services, Application Areas, ... 2020", published by MarketsandMarkets, the global Emotion Detection ... 22.65 Billion by 2020, at a CAGR of ...
(Date:1/15/2016)... JUAN, Puerto Rico , Jan. 15, 2016 /PRNewswire/ ... companies big and small to find new ways to ... driven culture. iOS and Android ... device based on biometrics, transforming it into a hardware ... request that users swipe their fingerprint on their KodeKey ...
(Date:1/8/2016)... MANCHESTER, United Kingdom , Jan. 8, 2016   ... diagnostic products, today announced the closing of a $9 million ... Proceeds from the financing will be used to accelerate the ... for detecting early-stage pressure ulcers. United ... receiving CE Mark approval. The device,s introduction has been met ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... ... February 10, 2016 , ... ... announced today the promotion of two long-standing principal investigators (PI) to the roles ... Clinical Research and Development. , Dr. Laurence Chu, a Benchmark Research PI in ...
(Date:2/10/2016)... San Mateo, CA (PRWEB) , ... February 10, ... ... Registry of Multiplex Testing (PROMPT), a research registry built on the secure online ... in September 2014. More than 1,600 participants have joined the PROMPT study, which ...
(Date:2/10/2016)... BC (PRWEB) , ... February 09, 2016 , ... ... design services and current winner of the Highest Overall Customer Rating Award ... in all of its business units across the USA, Canada, Mexico and China. ...
(Date:2/9/2016)... ... 2016 , ... Net-Translators, an industry-leading provider of translation, ... and improved website. In an on-going effort to further educate customers and emphasize ... how the company designs and delivers thorough, high-quality results for its growing customer ...
Breaking Biology Technology:
Cached News: