I make courses on the Garmin Connect page, but when I walk those courses, the miles on my vívofit don't match the miles that the course should be. For instance, this morning I walked 4.3 miles, but my vívofit says I have only walked 3.33. The other day, I did 9 miles, but the vívofit says I only did 7.02. Do I need to change my stride length? I'm not sure what to do.
