I've heard runners talking about their PRs and I'm embarrassed to ask what that means. What are they talking about?
You may also hear some runners call their best race times "PBs" or "Personal Bests." Whatever they call it, experienced runners love to talk about their PRs because it helps them stay motivated to keep training and racing. It's also fun to keep track of your PRs in your training log, so you can refer back to them and record a new one when you achieve it.

