How much water should a 40-45 year old man drink a day?

Answer 1

It depends on the weight of the person. In general, 64 ounces of water not including soft drinks, juices, or other drinks/foods should be taken in daily. For every 10 pounds overweight an additional 8 ounces should be drank to begin the process of losing weight

Answer 2

There is no categorically correct answer. Don't listen to the people that will tell you everybody needs 8 glasses of water a day. It will vary by person, place, and atmospheric conditions (temp and humidity). For a single person, it will depend on how much you perspire, how much you are urinating, and how much you are eating.

How much you perspire is dependent upon how much warmer your body is over the surrounding air and how much humidity is in the air. Your body will adjust the amount of perspiration to cool your body as needed. Cycling in Arizona in the summer--you will probably need to drink at least one quart per hour. Seattle in the winter (cool and humid), perhaps none at all. Because the temp and humidity changes by season, your water needs will also vary by season.

Whether your body needs to rid itself of some chemical that it doesn't like will determine the typical amount you urinate. Alcohol, caffeine, narcotics, water soluble vitamins like vitamin C, etc. are all things that will make your body need to expend water to cleanse itself.

If you eat a bunch of dry food like meats, your digestive system will need extra water to digest it. Conversely, if you eat wet foods like fruits and vegetables you may need no additional water for digestion.

So, I'd suggest that you simply monitor yourself. Increase the amount you drink until you are urinating more frequently than you want to. Remember, it will vary by your lifestyle and the season. If you live in a place or workout enough so that you are perspiring a lot, you will need to make sure that what you are drinking has extra electrolytes because your body also loses those in the perspiration. There is a condition known as hypernatremia which causes the brain to swell. It is caused by drinking too much pure water when your sodium level has dropped significantly, such as if you only drank water while running a marathon in a hot dry climate. You can continue to just drink plain water in such a situation, but you need to supplement with food that contains electrolytes or supplement with the straight electrolyte. When your electrolytes are in balance, your body will simply eliminate the extra water through urination.

Good luck.