I usually run mine nekkid anyways, but never seen or heard of anyone having collar troubles around here. People use muzzles as well, which could cause the same potential problem I guess. I do use those now always.
Most of our oval races are continuous loop. But of course the straights are drag.
I was little bit affraid tahat Mody wiould be interested in other dogs and not in me, but how I was suprised (and all the audience including judge) when lttle princess was running by me and lookind at my face with head queeny up….she was excellent, made for ring:) I think she was really enjoying the attention:)