Started out the run with a slight tendon ache on the inside of my left knee which is the norm. I wish that would go away. I hadn't had a fast day for awhile so I decided I'd try one today. I ran miles 3&4 in 6:10 & 6:02. I then changed into my running sandals and welcomed the 1-2 minute rest. Ran 1 mile in the sandals.