Why during fajr? ???
I work nights, and this was in the winter time, so I was able to go after work. There really wasn't anything special about the specific time, I just remember stewing the whole night and finally realizing that I just needed to do something, take action, etc, etc.
Also, please share your secrets to your love for exercise. That sounds like exercise I need!
I kind of hate exercise, but my ancestors were all farmers going back to the 15th century and I just have this need to do heavy, physical work. This is not possible to do in this civilized age of ours (well, it is possible, but you have to sacrifice the concept of being able to afford to eat food), so I turned to lifting heavy things. There's a book called "Starting Strength" that is an introduction to power lifting that many recommend. I am starting a new thing lately that's more into the strongman style thing, and I am currently in intense pain from running up and down the street in front of my apartment building with 120 kg in hand.
There's no amount of reading that can be unhealthy. I'm slowly trying to get into it more. Check out the recommended reading list https//free-minds.org/forum/index.php?topic=16391.0
My wife has been on a natural history kick, so I'm reading a bunch of books on mycology at the moment. Also, did you know that fungi digest their food on the outside of their bodies? (Bodies being used loosely, of course.) Also, their exterior structures are covered in chitin like insects!