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Gym Teacher Won't Let Kids Drink Water

Pediatrics Expert Advice from Shari Nethersole, M.D.

Q: My fifth-grader's gym teacher won't allow the children to get drinks of water after making them exercise in 80-degree weather. At no point during the activity is a child given permission to go near the drinking fountain. If my daughter sweats, doesn't she need to rehydrate?

A: As you suggest, when exercising in hot weather, it's important to stay well-hydrated. The hotter it is, the more you sweat and lose body fluids. Exercising for an hour in 80-degree weather can cause your body to lose twice as much fluid as doing the same exercise in 50-degree weather.

Children who start to become dehydrated can have stomach and leg cramps, fatigue, and confusion. With severe dehydration, they are more at risk for heat stroke and shock. The question is: In order to maintain hydration when your child exercises in hot weather, how much water should she drink and how frequently? The exact amount will vary depending on the size of the child, the air temperature and humidity (amount of moisture in the air), and the intensity of the exercise. For instance, continuous running for 30 minutes will cause a child to lose more fluid than playing a baseball game for 30 minutes.

Current recommendations for an average-sized 10- or 11-year-old are that she should drink at least 4 ounces (a half-cup) of water every 20 minutes when exercising outdoors in hot weather. Assuming a gym class is a typical 40-minute period, this would mean that the children should drink at least twice during each class.

Medical guidelines clearly dictate the need for water during exercise, and a physical education teacher should be aware of this. Is the teacher's prohibition due to problems with horseplay by kids who go to the fountain? I doubt she really wants to allow the children to become dehydrated. The teacher needs to change the drinking policy right away. If you do not get a response, you should talk with the school nurse or principal and enlist her support.

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Shari Nethersole is a physician at Children's Hospital, Boston, and an instructor in Pediatrics at Harvard Medical School. She graduated from Yale University and Harvard Medical School, and did her internship and residency at Children's Hospital, Boston. As a pediatrician, she tries to work with parents to identify and address their concerns.


Please note: This "Expert Advice" area of FamilyEducation.com should be used for general information purposes only. Advice given here is not intended to provide a basis for action in particular circumstances without consideration by a competent professional. Before using this Expert Advice area, please review our General and Medical Disclaimers.

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