From my Aus seminar notes
The best way I can relate my understanding of the CNS is that it is like a cup. You never want it to overflow! This means you should always play it safe. You are better to slightly under train than over train. Supercompensation may not be as great but it will still be ok. Never go for the great super workout as the best possible outcome from it is a return to normal. There is no need to see the ultimate levels of an athlete in training.