This is a damned-if-you-do-damned-if-you-dont situation. If OP says you should fast and someone gets hurt, that's bad. If OP says you shouldn't fast then what gains could have been made in that lost time.
A better way of looking at it is to take it incrementally
* skipping breakfast
* skipping breakfast and lunch
* skipping a whole day
* eating one meal every two days
* eating one meal every three days
* ...you get the point...
I don't think OP would advocate just jumping right into it. Start small, work up from there, listen to your body. You wouldn't jump right into running a full marathon.
I believe I say multiple times in this thread nobody should just jump in and do 60 days, however I believe anyone (caveat-ed up thread) can 'jump in' and do 7 days at any point in their life.
It won't be easy, it'll be especially hard if you've never fasted before and are on a standard diet, but it won't be dangerous. It'll just probably be the most difficult physical and mental thing you've ever done.
Also, thanks for linking to my spreadsheet up there.
A better way of looking at it is to take it incrementally
* skipping breakfast
* skipping breakfast and lunch
* skipping a whole day
* eating one meal every two days
* eating one meal every three days
* ...you get the point...
I don't think OP would advocate just jumping right into it. Start small, work up from there, listen to your body. You wouldn't jump right into running a full marathon.