I can also add to this... my Physician told me that water at bed time will also help prevent night time leg cramps. Your leg muscles are seeking hydration when they cramp and wake you up with a Charlie Horse. Yikeseroooo... they used to wake me up...now with water I'm free of them!
I know these facts helped me to get in my daily quota, so feel free to post or share with others. The family that drinks water together stays healthy together!