And also better than no riding at all. Today's weather was FUNKY. I started mowing the lawn and had to quit twice because it began snowing & sleeting. This blew my riding time out the window so I had to settle for a run. I so hate running. At least I got my heart rate up and kept it there for a while. That's what counts in my mind. I don't think I'm really building leg muscles with the how infrequently I run.