Water retention and weight gain

Question:
Do I really need to drink a lot of fluids specifically water when doing my workout? My friends have told me that I should limit my fluid intake because it will add up and cause weight gain.

I've been working out for the past 14 months and my Abs still have not changed. My upper body has improved, now it's just my belly and waistline. Is it because of fluid retention? Thanks.

Answer:
Drink at least 1 gallon of water a day. Drinking water doesn't cause water weight, dehydration however does. When the body doesn't get enough water, it is more likely to hold onto any drop of water that it gets. It's a survival mechanism.

When you drink enough water, you reassure the body that is in fact getting an adequate amount, and the body will therefore not retain anything, because it will understand that it is getting enough.

Drinking water is only beneficial. Sip on it all day.