Submitted by: - Bill, Carmel, CA
I vote, in most cases, for water. Current recommendations are to drink 1/2 to 2/3 ounce of water per pound of body weight per day, ingested periodically throughout the day. Figured in liters, that's about 3-4 liters per day for the average-sized person.
In extremes of heat, such as summer hiking in the Grand Canyon, a body's need for water can also be extreme, more than the average. It's best to check with local experts and/or land managers about fluid intake, and follow their directions. The most important factor in hydration may be self-monitoring: Do you feel okay? Are you thirsty? Is your urine relatively clear?




