Mike.....
train legs heavy, explosive, & with a lot of reps.....take a quick breath.....repeat.
You want to train them with so much intensity....that they'll have to wheel you out of the gym.
Years back when I used to train with a lot more intensity....leg day was the worse.
I used to drive a standard & on leg day....i'd be sitting in the parking lot for 20-30 minutes after my workout trying to get my legs to quit shaking when I pressed down the clutch.
Those days were painful...but fun!