Ran easy 4 mi then did 3 x 0.5 mi gradual accelerations down to 5K pace. Ran 1 mi easy between each rep. Finished off running easy the rest of the way. Upper right chest was bothersome throughout and forced me to focus on belly breathing. My right calf started to bother me towards the end as well. Kind of downer that these things are cropping up when I feel like I'm making great progress. We'll see how things feel tomorrow.
1:43:00 13 mi - 7:55 avg