Do you run when you have a cold?

If it's a head cold, running is fine.
If it's below the neck, don't run.

If the cold is in my head, then I'll keep running, being careful not to overdo it. Once it's dropped into my chest, though, I'll take some time off to recover.

This varies from person to person, and always listen to your body and don't over-exert yourself when you're feeling sick, but I find that when I am congested/stuffy nose, going for a run can clear out my nose and airway. If I run when I have a cold, I run slower, for shorter distances, and drink extra water for the rest of the day. I'll also have a larger snack after I run so that I don't feel as run down.

I ran a marathon in January of this year, and living in NY, a good portion of my training runs towards the end of training were in the evenings after work when it was already dark, it was COLD (but I enjoy cold weather running), and even when I was feeling a cold come on, I'd still get my training runs in. Make sure, especially as it gets cold out, that after your run, you get out of your sweaty running clothes and into normal clothes after a shower. If I'd sit around drinking chocolate milk and eating pretzels in my kitchen after a run before at least peeling off my outer jacket layer, I'd begin to shiver all over within a few minutes.

Good luck and feel better!

Head cold, yes. Chest cold, not even if you gave me $1, 000. I went running as I was getting over a chest cold (cough, chest congestion and I had a fever the first day or so). I went because my fever was gone and I started feeling a little better. Ended up with pneumonia. Missed 4 weeks of training in the 12 week cycle before my 2nd half. I won't do that ever again.