Bad chills after long run.

3 possibilities (IMO)

1. Dehydration - Water helps you regulate your body tempurature

2. Your body temperature takes a sharp drop at the end of your run (hence why they wrap marathoners in a space blanket"

3. you Might be getting sick.

Almost exact thing happened to me last weekend.  Ran 8 on saturday, got to 2 miles on Sunday, wasn't feeling it, went to the shower, got chills right after.  Actually passed out day after, EMT told me it might have been dehydration, turns out next day it was evident I got some flu bug.  I felt fine the first 2 days, no headache, no sore throat etc.

I'd agree with the three possibilities listed above. Could also be nutrition but not likely.

My second year doing tris I did more longer spring training rides and often would be so cold after wards that I'd get in bed after my shower to warm up. My coach at the time suggested the same ideas listed above. For me I think it was part building fitness as I was riding longer than I had and doing more excercise than I had in twenty years.

The chills hit me this morning after my 2 hour run and change. I typically drink enough water and do my chia seed regiment every day and before working out.

I did have that one 'cough' when I woke up this morning... that cough you hate. Chest congestion. I somewhat ignored it and made it through my run okay. However I am completely drained. Took some mucinex to try and break it up and get over this 'bug' quickly. Although I haven't really coughed much today, but I can feal the heavy chest.

The wife had the 'bug' last week, I thought I had missed it. well, on to the raw food diet, that usually does wonders.

Hope ya get over it quickly, as I hope I do too.

I've gone on some rides lately in the 40s and 50s and often when I get home it takes me a couple hours to warm up again.  Annoying, but hey, you burn more calories when your body is trying to warm back up!

If it is not a normal occurrence I would also second the illness theory.

-eric

FWIW, after each HIM I've run and a couple of my longer/harder other events, I've developed chills and sweats in bed that night.

Sounds very similar to what you describe.  Likely the result of your body trying to get back to "normal," as those relatively huge efforts can disturb your homeostasis or set point of your metabolism for a brief period (all sorts of abnormal or at least atypical stuff going on after going hard/deep - dehydration, muscle break down, etc.).  Or such is the opinion of a few of my physiologist friends (and me).

As was said, this could have been the build up of stress and this run put you over the top (hasn't happened that way to me, but we're all n=1).

Other possibilities are certainly as described above, and perhaps more likley - just an additional possibility (which I thought I'd add, as it freaked me out the first couple times!!!).

Matt