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Hot, cold or high in the sky.
Sweating in the heat or under multiple layers of winter clothing causes you to lose more fluids. You can also lose moisture through your skin from heated indoor air.
Higher altitudes (above 8,200 feet) can increase respiration and urination, increasing your fluid needs.
When you move it.
Generally, you should consume two cups of water two hours prior to your activity, then about one-half cup every 15 minutes during your activity. If you exercise more than an hour, drink an oral re-hydration solution to replace electrolytes and glucose. If you are an athlete, weigh yourself if you anticipate a long workout. For every pound you lose, drink two cups of liquid. |