Allegedly from a cardiologist:
When you stand up, gravity holds water in the lower body and swelling of the legs appears.
When you lie down, your lower body is at the kidney level. It is believed by some that it is easier for the kidneys to process fluids when the body is in a horizontal position.
The body needs a certain minimum of water to remove toxins from the body.
Drinking water at a certain point maximally affects the function of the body:
2 cups of water after waking up – helps activate internal organs
1 glass of water 30 minutes before eating – helps digestion
1 glass of water before bath – helps lower blood pressure
1 glass of water before bed – reduces risk of stroke or heart attack
In addition, water before bedtime also helps prevent leg cramps at night.
The leg muscles need fluid because they contract, and due to lack of fluid, you can wake up with a muscle spasm.
(Tom: How many people do you know that say they don’t want to drink water before bed because they have to get up at night because of it?
The solution to needing to get up at night is simple. Just don’t drink between 5 o’clock and your glass of water at bedtime.
It’s not the bedtime drink of water that is the problem. It is that bedtime drink of water added to what you drank during the preceding 5 hours that causes the need to go to the bathroom in the middle of the night.)