I had the same issue. I reorganized my workouts to coincide with feed days. I “rest” which is walking or yoga when I’m fasting and lift after I have eaten a good, low carb meal.
Helps with energy to get through the workout (carbs) and helps burn the carbs I just ate to get back into deep ketosis. I still make incremental strength gains as well. If you’re a veteran lifter…less is more.
when i do alot of activities i make sure i dont layer them all on one day
so instead of doing boxing+lifting+physical work in a single day, try to spread them like
1.work+boxing
2.work+gym
3.work+boxing
4.work+gym
5.work+boxing
6.gym
7.rest
on alternating days to reduce the load.
after that u just gotta be drinking crazy amounts of snake juice, if you feel fine then youre all good. i drink up to 1.5 gallons snake juice without taking a piss thru the whole day, thats how much i sweat i guess
and u gotta stay fat adapted all the time to have ur energy levels right