I did that for a while, while I was recuperating from an achilles strain. I had a lunchtime walking routine which turned into running but then had to use a bike, cuz running was outand I read biking was a great compliment/therapy for that type of sports injury. eventually, that turned into bike commuting. anyway it was really fun to extend my range by using a bike. of course once I started bike commuting I only walked at lunch cuz I was getting my fill of biking (in & out)