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Why Does Water Have Zero Calories?

by
author image Lisa M. Wolfe
A mother of two and passionate fitness presenter, Lisa M. Wolfe had her first fitness article published in 2001. She is the author of six fitness books and holds an Associate of Arts in exercise science from Oakland Community College. When not writing, Wolfe is hula-hooping, kayaking, walking or cycling.
Why Does Water Have Zero Calories?
Two young children are drinking water. Photo Credit Stockbyte/Stockbyte/Getty Images

You cannot survive beyond one week without water. Your muscles are 75 percent water and water is used to transport oxygen, nutrients and waste to and from your cells. Water is an important element in your healthy eating habits, yet contains zero calories, so it does not add to weight gain.

Calories

Calories are units of energy from food. Your body uses calories as fuel for your daily movements. The amount of energy in certain foods depends on the number of fats, carbohydrates and proteins that a food contains. One gram of fat equals nine calories. One gram of carbohydrates equals 4 calories. One gram of protein equals 4 calories. Most foods contain a mixture of all three of these nutrients.

Water

Water does not contain fats, carbohydrates or proteins, so therefore it does not contain any calories. Water is essential to your body's energy system, because it helps to transport the energy from the breakdown of foods into your cells, yet the water itself will not add calories to your body. Zero calories results in zero weight gain.

Beverage consumption

The American Journal of Clinical Nutrition lists different beverages and recommended daily consumption levels. They suggest that zero calorie water should be 50-80 percent of your daily beverage consumption. Daily fluid requirements vary person to person, so check with your doctor for the amount that is best for your body.

Exercise

The American Council on Exercise suggests replacing fluids lost during exercise with these guidelines:
Drink 17 to 20 oz. of water two hours prior to your workout.
Drink 7 to 10 oz. during your workout every ten to twenty minutes.
Drink 16 to 24 oz. for every pound of weight loss immediately after exercise.
Water will not add calories to replace that lost weight, it will simply replace lost fluid levels.

Benefits

At zero calories, water offiers an abundance of benefits. It acts to lubricate your joints, and protects your organs from shock. Water does not contain calories, but is used in the transportation of calories to your cells for energy use.

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