Bad Memory

I attempted to do key workout #1 today.  I did a mile warm up and then started my first of two 4 mile intervals at a 7:30 pace.  I made it 3 mile, and decided to call it quits.  My knee was acting up.  It funny because I kind of forgot about my knee, that first mile.  I didn’t feel any pain.  But then my memory came back to me…  I definitly need to give it a rest until Saturday.