Test levels tend to be higher in the afternoon.
you are warmed up
you have eaten, rather than fasting overnight.
The biggy is that Serratonin levels tend to be higher in the morning, making you slack and sleepy, down regulates the body. Different people have teh peak and troph at different times, and typically this alligns with the persons circadian rythyms. ie if yoiu are a night owl you will be at your peak later in the day..
I know sometimes at 10pm I juts feel like going for a run, just too much bottled energy, were as at 9am at gym laying there doing bench all I can think about is how it would be nice to have a sleep!
like you I would love to train later at night, another reason I want my own set up.