I've been doing a combination of intermittent and prolonged fasting for the last 6 months and have had some fantastic results. My diet follows the Wahls protocol, feel free to Google it, but it's basically a derivation of Paleo.
A typical week for me exercise wise is 3 days of powerlifting and 3 days of Jiu-Jitsu. I use the Barbell Medicine HLM program, which can be found
here. I did lose noticeable amounts of strength during the initial period of intermittent fasting, but after 6 weeks of an 8 week powerlifting program, I'm back to 85% of my previous 1RM's.
The below results are from a Hydrostatic body fat test. Since 7/22/18, body fat % is down 11.92%, total weight down 33lbs, fat down 29.15, lean mass only down 3.85lbs. Most noticeably, on my last test, I lost 9.4lbs of fat and gained 3.6lbs of lean mass.