Excuses aside, I mentally crack quite frequently in swimming. Here is a short history of my 500 times:
There are no times for 2006 - 2007 because I traumatized my neck skiing so I took it easy for a while and didn't bother swimming 500 for time. My time last night was an improvement, obviously, but I have a sense that I can go faster. In swim practice I swim 100s in 1:30 repeatedly (not on the 1:30 but total time 1:30) and it feels like that is 70-80% effort. I don't understand why I can't repeat that pace for a 500 and swim 7:30. Bill watched my last 50 last night and said my turnover slowed quite a bit.
My plan is to work on going hard on the last 25 of 100s and 200s and see what I can do in January. I smell a 7:30 and it smells good. Real good. Or maybe that's cookies again.