The issue of how much activity is called for on a fast is controversial. Natural Hygienists in the Herbert Shelton tradition insist that all fasters absolutely must have complete bed rest, with no books, no TV, no visitors, no enemas, no exercise, no music, and of course no food, not even a cup of herb tea. In my many years of conducting people through fasts, I have yet to meet an individual that could mentally tolerate this degree of nothingness. It is too drastic a withdrawal from all the stimulation people are used to in the twentieth century. I still don't know how Shelton managed to make his patients do it, but my guess is that he must have been a very intimidating guy. Shelton was a body builder of some renown in his day. I bet Shelton's patients kept a few books and magazines under their mattress and only took them out when he wasn't looking. If I had tried to enforced this type of sensory deprivation, I know my patients would have grabbed their clothes and run, vowing never to fast again. I think it is most important that people fast, and that they feel so good about the experience that they want to do it again, and talk all their sick friends into doing the same thing. In contrast to enforced inactivity, Russian researchers who supervised schizophrenics on 30 day water fasts insisted that they walk for three hours every day, without stopping. I would like to have been there to see how they managed to enforce that. I suspect some patients cheated. I lived with schizophrenics enough years to know that it is very difficult to get them to do anything that they don't want to do, and very few of them are into exercise, especially when fasting. In my experience both of these approaches to activity during the fast are extremes. The correct activity level should be arrived at on an individual basis. I have had clients who walked six miles a day during an extended water fast, but they were not feeling very sick when they started the fast, and they were also physically fit. In contrast I have had people on extended fasts who were unable to walk for exercise, or so weak they were unable to even walk to the bathroom, but these people were critically ill when they started fasting, and desperately needed to conserve what little vital force they had for healing.