I started running on the treadmill the day we got it. The first week, I put in a bit over six miles.

The second week, I logged nearly 12 miles.

Then, at the beginning of the third week, my left ankle began to hurt and feel stiff, like a knuckle that needs popping. I kept running but reduced my speed and distance, ending the week with 9 miles, but with three of my longest runs.

This weekend, on Sunday, I tried to run but my ankle hurt too much; I ended up walking about 4 miles instead in about 45 minutes. When I got off the treadmill, my ankle felt different. The popping, crackling stiffness was gone, but not the pain.

New, however, was a visible swelling and a mild sense of heat.

Dr. Google demonstrated to me that it is likely that I have given myself tendonitis, and instructed me to see an actual doctor.

So today I did that. The verdict? Stop running until the tendonitis heals.

The doc also told me that perhaps my target daily run of 2 miles in 20 minutes was somewhat aggressive and ambitious for someone with a lifelong distaste for physical activity. I’m sure he’s right.