I'm curious if you considered a 4 day fast every other week instead. The first two days are the hardest days of an extended fast (hungry, lethargic), so you might find this approach easier and more beneficial.
I’ve found coffee and the occasional 200mg caffeine pill with 400mg of L-Theanine helpful to push through the first day of a multi day fast, when your body is complaining about burning up its glucose reserves.
I’d love to give this a try, do you not workout during these or?
Yes, I work out daily, 30 minutes on a row machine, 30 minutes strength training. Strength training has been found to protect muscle tissue from wasting during fasts, and the cardio is because I enjoy it.
I did the same thing but I just went to 80~85% of my usual lifting weights and a 3km walk in my lunch breaks.
That's an interesting idea. The only thing that would give me pause is I know I'd get a lot of "Oh, look, dad is being weird and not eating dinner with the family all week again". The 48 hours is basically "hey I'm skipping dinner tonight".