If you usually work out in the gym, then you know how exhausting some intensive exercises can be.
You’ll be more exhausted if you perform work out movements that involve using a barbell with weight plates. Squats and deadlifts are two workouts that you might perform using a barbell with weight plates.
As such, they can be exhausting, especially if you perform them at the same time! But this is not to say you cannot perform them on the same day.