Cold.

I have a chest cold, but made it 3 miles last night. Here are the stats:

32:50
3.01
10:54/mile

I definitely felt it in my lungs, but tried to pick up the pace a couple of times. My legs felt strong though and that helped. I have a 5K this weekend and I hope the cold/congestion is better by then. Even with a slight cold I am zapped of energy during runs. It felt good to get back into it again though.