If you feel up to it do the walks. Dont push it though save your energy for work. I usually like to shop when I fast. I work twice a week for an old lady doing handyman work and such it's only 4 hours a day but I'm able to do it no problem. I find that if I sit and do nothing then I feel like shit if I start doing something my blood gets flowing but I wouldnt' dare do any heavy. I also do a lot of work around the house too. I find I tend to be obsessive compulsive when I work and fast. Example when I work on cars when i fast I use a tool then I set it in a certain place so I don't end up sitting on and I can't find it, every bolt and nut gets cleaned and tightened to with a torque wrench to proper torque. The hardest part of fasting for me is socializing with people. My mouth gets so damn dry that I have problems talking, I usually carry a water bottle with me so I can sit and sip as I'm talking. If you have any other question just ask.