That's particularly important during hot summer weather, says Brian Timmons, research director of the Child Health and Exercise Medicine Program at McMaster and principal investigator of the study.
"Children become dehydrated during exercise, and it's important they get enough fluids, particularly before going into a second round of a game. Milk is better than either a sports drink or water because it is a source of high quality protein, carbohydrates, calcium and electrolytes."
He added that milk replaces sodium lost in sweat and helps the body retain fluid better. As well, the milk provides protein needed by children for muscle development and growth which is not found in the other drinks.
The study of eight to 10-year-olds involved exercising in a climate chamber, then receiving a drink and being measured for hydration.
Timmons, an assistant professor of pediatrics of the Michael G. DeGroote School of Medicine, said active children and adults usually don't drink enough to stay hydrated during exercise, so they often have a "hydration disadvantage" when they start their next period of exercise.
He said that one per cent dehydration can have up to a 15 per cent decrease in performance, with an increased heart rate, core temperature and less ability to keep going. More significant dehydration comes with an increased risk of heat-related illness such as heat stroke.
The study is funded by Dairy Farmers of Canada.
Pictures of Brian Timmons and a graduate student with a study participant are available for downloading at: http://fhs.mcmaster.ca/media/media_20110815.html
Veronica McGuire | EurekAlert!
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For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
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