I do a fair amount of walking. At first, I would be reminded after 10 minutes of walking. It became less and less, and now it never "reminds" me. I figured that it may be because I walk so often that the watch no longer considers it to be working out. However, when I walk with someone that walks five miles a day, her watch prompts her every few minutes. Does the watch have some sort of method of figuring out if you're just walking or if you're WALKING?