Yesterday at the gym I upped my run/walk time to 5/1 instead of 4/1. It was a bitch. Several times I wanted to stop and give up. I even considered just leaving the gym! Towards the end it got so difficult.
Today I was dreading going to the gym because I was doing the same routine as yesterday. How the hell am I supposed to get thru that again?!
I surprised myself by making thru it just fine, having no problems whatsoever.
So remember, just because something seems difficult one day, doesn't mean it will feel like that the next. Keep pushing thru the discomfort.