When I discovered how good I felt once I started walking I had every intention of doing some kind of target exercise once I got used to the walking however that never happened because I quit altogether. Maybe this time I'll do it. The older I get the more I'm seeing how important exercise is.
You described the energy thing perfectly, as a matter of fact I had wondered if I would become addicted to exercise due to the fact if made me feel so good, but alas that didn't happen.
A lot of my work is also done at home but not all. I just decided to take a break from it all ha! I don't want to have to worry about work while I'm fasting, I glad you can do both.