91: a sunday "stroll" down the embarcadero

This may be complete psychological BS but my knee has been bothering me since Thursday's run and I feel like I hurt it because I was tired. Thursday I pushed myself to run on the frontage road at a quick pace for me and felt heavy, as though every step had a resounding "thud." Anyway, I didn't run Saturday and ran a laid back 3.88 miles today. Clay and I started at his office on 3rd and Brannan, ran down Brannan towards the water, up the Embarcadero to Battery and back. Weather was perfect...sunny and beautiful, not too hot and a little breezy. I feel better for having run but am still pooped and I slept in until NOON today...who sleep in until noon anymore?!