This has been bugging me for quite a while...why can't I be awarded badges for walking 5K/10K/half/full-marathon/etc.? To me, it should not matter whether I walk or run the distance since I'm in either case using bipedal motion. There's no way I can run/jog a half-marathon, but I've walked several, but I can't get badge credit unless I lie and say I ran it.