There is a simple way to get rid of any doubt and restore the meaning of having leaderboard for runners without having to compare performances among runners, electrobikers (cheaters), cyclists, skaters, and even rowers, believe it or not.
Take the world record time for the distance in the segment and automatically invalidate any time below this threshold or force the user to choose another type of activity, e.g. cycling. Otherwise, please eliminate segments because they make no sense.
