Walking as a health hazard

I had my annual physical. Nothing much to report. I'm in pretty good shape for the shape I'm in.

We live about a quarter-mile from the doctor's office, a nice walk on a cool morning. On the way, a neighbor drives past quickly. She's talking on the phone and  drinking a cup of coffee. She waves a friendly greeting.

When I get to the office, I mention to my doctor that one of my riskiest habits is walking to doctor's office.