I'm away at the moment. I normally cycle around 120km a week, and I haven't run for ages. Anyhow, because I'm away I brought my running shoes with full intention of getting a few short runs in to keep my legs turning. I dug out a local map and picked a relatively short 3 mile loop, late evening so not too hot. Set off at a relatively steady pace (6'22" average) and was really enjoying myself until the last 500yds.
I've had a bit of a tight Achilles on my left leg for a while now, and it's been a bit prickly around my heel when I've been stretching off, and it always eases after stretching, and rarely gives me any bother when I'm cycling. Anyhow, last 500yds of my run and it feels like my left calf was starting to cramp, so I backed off and as soon as I did I got a searing pain in the bottom of my calf (soleus muscle area) which radiated down in to my heel. After a couple of days I developed a bruise on my heel, and I'm really struggling going up and down stairs or getting in and out of the car.
I'm doing all the good stuff (elevating, compressing and Ice when I can), and I've bought a fairly substantial neoprene brace which keeps the joint fairly immobile, but I think I've probably done some damage. I'm back in the UK a week on Monday, so hopefully I can get it seen to when I get back.