Yesterday i was faced with a strange "injury". Last week i lightly strained my achilles heel when making a strange twist with my foot. after a week of complete rest the pain fully subsided.
Tuesday i went for a small/slow run. I still felt something odd in the achilles heel but no pain and I could keep on running. I ran 5.5 km (didn't want to overdo it).
Yesterday morning I still wasn't feeling anything so i decided to do a light run in the evening (9.5km). Which is not unusual for me (I normally run 40km+ in a week). I started running and for the first 6k i did again feel that achilles heel with some very, very slight dull pain. At the 6k mark my achilles heel snapped twice (almost lost my balance) in 30 - 50m. At first a sharp pain but then again the pain disappeared.
At first i panicked. I stopped on the side of the road to see what was wrong. The achilles heel could still support my weight.So I walked some meters but then i was able to run the remaining 3k to home. Constantly feeling a light dull, non-hampering (my tempo didn't suffer) pain.
At home there wens't any redness or inflammation visibile. To be sure I iced it, still feeling the light pain. This morning I awoke with the same light pain.But by now (10 AM) the pain is again gone.
The problem obviously isn't a tear or a rupture in/of the tendon. Any significant injury would have prevented me from continuing the run. Nor can i find any information about the snap (without rupture) on the net.
What happened to tendon to snap like that? Is there something i should worry about?
By snapping I mean the following: It was just like a large amount of pressure suddenly got released by the heel. Like the heel couldn't handle the stress anymore and it give way in an instant, releasing all the stress in a single burst. This gave me the weird sensation of "falling" through my foot.
P.S. I have had no Achilles heel injuries prior to this one. Or any other injury in the last 4 months.
P.S. 2: I'm made an appointment with the doctor. But i would still like the input from some seasoned runners.