I am obese. I weigh around 245. I want to do a long fast, the thing is I walk dogs about 2 hours of walking a day or more.
I can't rest in bed all day.
From what I read around here and there, obese people can have more energy while fasting. So, it shouldn't be a problem?
I read an article, I can't find it, about an extremely obese man who went a year fasting.

Hi Hungry4,

Walking 2 hours per day in a water only fast is definately one way to go and especially if fat burning is an extremely high priority as it is with you.  Such activity is encouraged among some fasting experts, partilarly Russians.  Just know that the cleansing and healing will come at a slower pace and even with the 2 hours of daily walking it is ideal to lay in bed as much as possible throughout the other 22 hours as the benefits of fasting are optimized through profound rest.

2 hours of daily brisk walking is how i conducted the first of my 3 long fasts, partly because at that time i,  too,  wanted to burn as much fat as possible... and the benefits from that fast as with my two long "resting fasts" were extraordinary.  For me, getting started on the walk has always been the hardest part and after the first few minutes, it's been fairly easy to keep going. The brisk walking actually helped me to feel more energetic throughout the fast, but it is important to note that this is because of a slowed detox.  

Splash is absolutely right about the importance of moving the lymphs, preferably several times per day and 2 minutes of gentle bouncing on a mini-trampoline is a great way to accomplish this. 

for more on this:

"... Rebounding on a mini trampoline is perhaps the most efficient and forceful means of flushing the lymph while stimulating the immune system and defending against cancer and other ailments. During rebound exercise the forces of the upward and downward bounces – acceleration and deceleration – are vertically aligned on the same plane with gravity. It was proven by Albert Einstein in 1911 that the aligned forces of acceleration, deceleration and gravity result in an increased gravitational load (1). What this means for the body is that during rebound exercise cells adjust to the increased load by becoming stronger. Rebounding strengthens virtually every cell of the body at the same time and is equivalent to resistance training for the cells.

It takes only two minutes of rebounding to flush the entire lymphatic system, while cleansing and strengthening cells and lymph nodes. A further benefit to the body is that during this brief time span the white blood cells of the immune system triple in number and remain elevated for an hour. These specialized cells play a major role in the body’s defense against illness and disease. For one full hour their activity is increased as they perform their tasks of destroying and eliminating cancer cells and other toxins, expending themselves in the process. An hour after rebounding for two minutes the white blood cell count returns to normal (1, 2, 3) [footnoted].

At this point another two-minute rebound session would increase the demand for white blood cells as the process of cleansing, strengthening, and the flushing away of spent cells and other cancerous debris is repeated. A therapeutic strategy to rebuild health would be to rebound for two minutes every waking hour, or as many times a day as possible. Two minutes of gentle bouncing throughout the day is more effective for healing than one long session. Repeated short sessions sustain an active immune system, oxygenate and strengthen cells, and continuously cleanse the lymph. Therapeutic rebounding has been shown to reduce cancerous tumors and improve or heal a host of other ailments (3)."

from: http://www.greendivamom.com/2009/03/05/whole-body-detox-part-1-lymphatic-clea...

and for more info on this:  http://www.healingdaily.com/exercise/rebounding-for-detoxification-and-health...

And Wheatgrass Yogi is right about the benefits of dry fasting.  I would encourage drinking only to thirst and if you want to take it a step further as i do, actually resisting mild thrist that comes and goes and awaiting a thirst that is more moderate and persisting.