Hoo, what do you expect if you are constantly running? If you find a roaming bear, you can catch up to it by following its tracks, especially Polar Bears. They will spook from 80 meters if you are running, and will continue to do so, as long as you keep on running. The old reaction of Grizzlies was to stand their ground only if you ran to them as soon as you got a call. Once they spook, you would never see them again by running at them.
My observations only...your mileage may be different.