I always thought records were there to be broken.
Your ups and downs in sports, I think they are as normal as daily life: One day you wake up and feel great, the next day you wake up and feel maybe less great.
Psychologically speaking, it's very important to be in good shape. I work in a sport that requires you to react quickly and be in excellent shape. Besides, things don't get easier as you get older.
In sport there is never any moment that is the same as the other. I have been in Formula One for 12 years, and out of that I had one year with the perfect car.