There's workout, and then there's workout. Try squatting 405lbs or deadlifting 495lbs for reps (or whatever your limits are when it comes to maximum exertion).

There's workout, and then there's workout. Try squatting 405lbs or deadlifting 495lbs for reps (or whatever your limits are when it comes to maximum exertion). That stuff wears you out pretty good. I wouldn't recommend doing it in the morning. Cardio, light lifting, sure, but that doesn't really tax the CNS that much.