Recently, especially on social media, I've seen runners who are setting PR's while on a training run.⠀
To me, it's a curious phenomenon as to why runners are running "all-out" efforts in training. In my 20 years of running, I've never even come close to setting a PR in a training run - that's always been something for the races.⠀
If you've set a PR during a training run, can you tell me how you set out to do that? Was it on purpose?
