I have experienced that if skip even one day after 8 hour of physical labor streak my energy levels suddenly go to the bottom and I start to feel super bad. It’s quite strange because I do not think I could not be depressed if I had a sedentary job. Sedentary things just destroy me. Also I like and wanted job in programming/cs so yeah. Gotta career switch or something apparently because cardio in the evening isn’t enough, I am like golden retriever. Only truly satisfied when all my muscles ache at the end of the day. And also I need immediate results out of my work
The body rewards physical excercise with dopamine and endorphins. ADHD people are especially sensitive to rewards. You are accustomed to that now and it’s your new normal. I think that you could readjust after a while if you stopped the physical activity but that’s your choice.