Hey Indivi, I have a suggestion. Make an option where you only have to press one time if you are grinding for stats at the gym. It kinda goes like this:
"Do you want to do weightlifts for the rest of the day?"
Yes No
If you pick Yes, then all your remaining stamina will be depleted, but you will gain STR in exchange in one go.
The option for doing it one at a time will still be there for those who want to spam Z/Enter button.
You can also do it with the other training areas like the MYS training in Translavania, but this time with ERO or something.