HOME >> BIOLOGY >> NEWS
A water tale for all seasons: When it comes to hydration and exercise, the system works

Dehydration has minimal effect in cold, but cuts performance by 8% as temperature rises; the difference between a 2:30 and a 2:42 marathon

Common sense" tips on hydration

BETHESDA, Md. (Sept. 4, 2005) For over 20 years, the U.S. Army Research Institute of Environmental Medicine has studied the effect of temperature and the environment on physical performance. According to Michael Sawka, chief of USARIEM's Thermal and Mountain Medicine Division, "we're filling in the data gaps regarding the interaction of temperature and hydration on physical performance so we can set guidelines to optimize results relevant not just to soldiers or navy divers, but to athletes, firefighters and hunters anyone who's in extreme environments without access to food or water for long periods."

Several recent USARIEM studies in the Journal of Applied Physiology describe experiments in both warm and cold temperatures. One report showed that dehydration reduces physical performance, in this case cycling, 8% in temperate/cool air (68 degrees Fahrenheit), but only 3% in a cold 36 degrees F. Furthermore it found that cold weather itself had an insignificant impact on physical performance, irrespective of hydration level.

A second USARIEM-generated study found that ingesting glycerol, a sweetish syrup, was an effective hyperhydration agent, causing "nearly twice as much fluid" to be retained after four hours of cold-air exposure (CAE) compared with water ingestion alone. "This study also demonstrates that hyperhydration doesn't modify cardiovascular or thermoregulatory responses during resting CAE," the reported added.

How glycerol may hold water 'in reserve' in body for use later

The implications of the second study are particularly interesting for prolonged outdoor exposure when rehydration is not possible. "Because glycerol is freely distributed in body water, hyperhydration with GI (glycerol ingesti
'"/>


2-Sep-2005


Page: 1 2 3 4

Related biology news :

1. New system of wastewater treatment could reduce the size of treatment plants by half
2. Space-borne sensors help Africa tackle water shortage problems
3. Chickens dieting to help Delaware waterways
4. New aerogels could clean contaminated water, purify hydrogen for fuel cells
5. Seawater intrusion is the first cause of contamination of coastal aquifers
6. Study finds contaminated water reaching Floridas offshore keys
7. Alternative farming cleans up water
8. Masquerading in murky waters
9. The origin of perennial water-ice at the South Pole of Mars
10. Loss of hemlocks will affect water dynamics in southern Appalachian forests
11. Biocontrol of invasive water hyacinth contributes to socioeconomic and health improvements in Africa

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


(Date:7/20/2017)... WASHINGTON , July 20, 2017 Delta (NYSE: ... to board any Delta aircraft at Reagan Washington National Airport (DCA). ... Delta launches biometrics ... Delta,s ... Delta Sky Club is now integrated into the boarding process to ...
(Date:5/23/2017)... 2017  Hunova, the first robotic gym for the rehabilitation and functional ... in Genoa, Italy . The first 30 robots will ... USA . The technology was developed and patented at ... IIT spin-off Movendo Technology thanks to a 10 million euro investment from ... click: ...
(Date:4/24/2017)... 24, 2017 Janice Kephart , ... Identity Strategy Partners, LLP (IdSP) , today issues ... President Trump,s March 6, 2017 Executive Order: ... vetting can be instilled with greater confidence, enabling ... all refugee applications are suspended by until at ...
Breaking Biology News(10 mins):
(Date:9/22/2017)... ... September 22, 2017 , ... Precision Periodontics ... offering LANAP® and LAPIP™ laser treatments. Drs. Hoge and Zalewsky are members of ... minimally invasive and less painful option that produces real results. , "Like many ...
(Date:9/21/2017)... Colmar (France) , ... (PRWEB) September 21, 2017 ... ... is an international scientific and technical congress to review the latest knowledge on ... panel of prestigious international speakers will discuss the impact of Biostimulants on Plant ...
(Date:9/21/2017)... CALIF. (PRWEB) , ... September 21, 2017 , ... Lajollacooks4u ... this month. The organization, a worldwide society of professional women with high achievement ... to hold its annual dinner. , Twelve members began with an olive ...
(Date:9/20/2017)... Bell, PA and College Station, TX (PRWEB) , ... ... ... IPS-Integrated Project Services, LLC (IPS), a leading global provider of ... Manufacturing, Inc. the leading provider of prefabricated cleanrooms, today announced the unveiling ...
Breaking Biology Technology:
Cached News: