Well, fasting is faith driven. Where there is a will there is a way.
I am a muslim and I am fasting. I try to abide by fasting rules as prescribed, however, no one is stopping me from drinking a glass of water if I feel thirsty or feable for I will fast again only if I get to live and am healthy.
Here is my day of fast:
wake up at 2:30 am drink some(plenty) water
brush and do ablution. say midnight prayer (about 8 cycles)
Have sahoor (light meal with youghurt) at about 3:30
Goto mosque for fajr prayer and reciet Holy Quran for half an hour
Sleep for two hours before going to office.
At sunset break fast with a date or two and some fruits, drink a some(plenty) water ( sometimes I mix milk with 7up to make up half litre drink) and say sunset prayer.
Eat Iftar at 7 pm
Goto mosque for night prayer and recite Holy Quran for half an hour.
At 9 pm I walk a few kilometers before I sleep.
And I don't feel any weekness or thirst during the day.
As you guessed it might not be my regular schedule but mostly.