[bdp]

Stardom,

You must do some research before you do an extended fast, or you may risk your health. That said, most of the people replying to your questions are misinformed. The book "Fasting and Eating for Health" by Dr. Joel Fuhrman has everything you need to know. Here are some answers to your questions:

After your 2nd day of fasting your body will be using fat, not muscle. The body isn't stupid; it has fat stores specifically for situations like this.

Water fasting results in rapid weight loss; expect 2 lbs a day, 1 of those being fat. You will not gain back the lost fat if you adhere to a strict, healthy diet after your fast. Otherwise, you will gain all of it back and then some (because your metabolism will be slowed for a while). I recently did a 5 day water fast to detoxify my body, and I lost 5 lbs of fat that has stayed off.

For an extended fast to be beneficial and safe, you must rest and sleep as much as you can. After a few days you will likely be too weak to do much of anything.

Drink tons of water to help your body detoxify.

Avoid hot showers or baths, because they can dehydrate you.

In conclusion, you shouldn't do a water fast until you read that book by Dr. Fuhrman. Another way to detoxify and lose fat is a juice fast of some type. The site mentioned by ginkgo is a good resource.