Sorry for not being clear, I mean energetic after the workout and sharper with the exception of when I make a workout more brutal.
Might also be a case of not knowing when to pick and choose your battles.
After lower body workouts I always like to go for a 30-60 minute walk and I think it helps a lot.
There all things to think about.
Do you have a log? If so, you might want to start logging how you feel before, during, and after the workouts to see if you can spot a pattern. I would definitely start doing something for conditioning (whether it's shorter rest between sets or complexes, sled work, hill sprints; maybe even just regular walking can do the trick)