If I'm in the water swimming, do I still need to drink?

Probably not during your training or event, unless you did not hydrate properly before and/or you will be very active in the water longer than 60 minutes. Otherwise 3-6 oz of fluids every 15 minutes is generally recommended. Other than the fact that swimmers wouldn't have the same sweat losses as other athletes training in hot weather, they should basically follow the same athletic hydration guidelines shown below:

General Fluid Requirements

• Fluids should be cold, palatable and selected based on the type and duration of the activity.

• Sports drinks should contain four to eight percent carbohydrate. Drinks greater than 10 percent carbohydrate may slow stomach emptying, cause abdominal cramping and impair performance.

• Drinks with a combination of glucose, glucose polymers and fructose may enhance water absorption.

• Solutions containing primarily fructose can cause an upset stomach and should be avoided.  Be sure to check the food label for ingredients.

Pre-exercise Guidelines

• Drink approximately 16 to 24 ounces of fluid two hours before activity.

• On warm or humid days, drink an additional 8-16 oz 30 to 60 minutes before activity.

• Water is adequate for activities less than an hour as long as meals are consumed regularly.

• For endurance events, training sessions longer than 60 minutes, or multiple practices a day, choose a sport drink containing four to eight percent carbohydrate (e.g. Gatorade).

During Exercise

• Depending on your sport, consume three to six fluid ounces of water or sports drink every 15 minutes.  This equates to approximately 32 ounces per hour.

• For prolonged exercise greater than 60 minutes, choose a sports drink with small amounts of electrolytes.

Post-exercise Guidelines

• Immediately following activity, drink at least 16 to 20 ounces of fluid for every pound of weight lost to ensure proper rehydration.

• A liquid shake with high carbohydrate content, minimal protein and fat can refuel energy stores and maximize recovery after demanding training bouts. Consume this as soon as possible after workouts or events:

• Drink an additional 16 ounces with your post workout meal. This meal should be consumed within two hours after activity.

• Weigh yourself each morning.  A fairly stable weight generally indicates proper fluid balance.

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