[perow1]

You can be tired. It can also bee that you start to get expectations. If you have had a period of development it is easier to remember how good you have been and start to think of what times you are capable of.

Expectations are hard to deal with during static since you do best with an empty mind. It might be good to set a smaller goal for a period and work from there.

Often tiredness coincide with this factor. For me anyway.