Two years ago I ran the half for the first time, and last year I ran the full. About a month and half after that, I got hurt. The diagnosis was achilles tendonitis and the prescription was months of rest.
Late in April I started running short distances again, with only mild discomfort. It’s continued to get better since then, and I’ve managed to stretch out the distances of my training runs, usually stopping after 30 minutes or so to stretch.
Today I ran the 10K in just over 50 minutes, which came out to 8:05 minute miles. That’s fast for me (I had it in mind to average 9 minute miles, but the competition of running with others gets the best of me). More importantly, I didn’t feel the need to stop to stretch.