if you are in the running for a top place maybe but if you are just a middle of the packer make a pit stop......I was shooting for a 2:45 marathon in Portland and had to pee mid race and I stopped and I swear it was the longest pee ever and ended up running 2:48......pretty sure it really was not a 3 minute break it just seemed like it at the time........still glad I made the pit stop instead of peeing myself......