My father said the same thing. The last water fast I did was in 2011....it was my fourth one, at True North in CA. My folks had been seeing what I was going through and all the shit I was doing and because of that period in my life, not only did I learn alot, so did the people closest to me by default. To this day my father still juices 3 times a week, gets sun and is a very active 72 year old. Runs circles around his peers. Anyway, he wanted to try and fast, so he came with me and was my bunkmate. His very first fast he did 14 days. He kept saying...."this is weird" "I'm not even hungry" "this isn't that bad at all" That man never had a down day. He obviously had a lot more reserves then me, but he would walk outside on the grounds and do laps.........after three or four days, I don't move off the couch......lol.
When fasting, you literally should do nothing. You want ALL your bodies energy to go into house cleaning mode. Especially if you don't hold alot of body fat, which I don't. My Dad had a nice big tank of fuel (Belly) so he had energy through the whole thing. I learned that the hard way, doing too much while fasting brings on more negatives then anything.
Seeing as it's been a decade or so, I could use a nice little tune up, but I just don't have the time now. Plus i'll have to rebuild everything I've been working on for the past ten years.
It's gonna have to wait until after I get my pictures taken for TMO