if you weight lift regularly fasted it’s great. Body conditions to it.
If you do it first time, all your numbers will be down, and you’ll feel weak and tired. That changes as you condition to it regularly.
48 hours and your body supposedly floods growth hormone so in theory should maximize growth.
don’t binge re-feed post workout as you would normally be able to, because your stomach will not be able to handle it and you will get stomach cramps and feel very ill - you need to build up with little bits then wait 5/10 mins etc.,