Quick Answer
PR = personal record. Your fastest time at a specific distance. PB = personal best (same thing, used outside the US). You have a separate PR for every distance you race — a 5K PR, a mile PR, a marathon PR, etc. Setting a new PR means you’ve run faster than you ever have before at that distance.
PR vs PB vs Other Running Abbreviations
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| Abbreviation | Stands For | What It Means |
|---|---|---|
| PR | Personal Record | Your fastest time ever at a distance. US term. |
| PB | Personal Best | Same as PR. Used in the UK, Australia, Canada, and internationally. |
| SB | Season Best | Your fastest time this season (resets each year/season). |
| CR | Course Record | The fastest time ever run on a specific course. |
| DNF | Did Not Finish | Started the race but didn't complete it. |
| DNS | Did Not Start | Registered but didn't start the race. |
| BQ | Boston Qualifier | A marathon time fast enough to qualify for the Boston Marathon. |
| AG | Age Group | Your competitive category based on age (e.g. M30–34). |
| NR | National Record | The fastest time in a country for a specific event. |
| WR | World Record | The fastest time ever recorded globally for an event. |
How PRs Work
You have a separate PR for every distance you race. A runner might hold a 100m PR, a mile PR, a 5K PR, a 10K PR, a half marathon PR, and a marathon PR simultaneously. Setting a new one means you’ve run that distance faster than you ever have before.
Some runners also track PRs by surface or context — a track 5,000m PR might be different from a road 5K PR because track surfaces are typically faster. Similarly, you might keep a separate trail marathon PR and road marathon PR, since terrain makes a meaningful difference.
A season best (SB) is your fastest time for a distance within the current season. It resets each year, while your lifetime PR only changes when you beat it. Apps like Strava and Garmin automatically track your PRs and will flag a new one when you achieve it.
How to Set a New PR
Most runners see their biggest PR improvements in the first 1–2 years of structured training. After that, gains come in smaller increments but remain achievable for years with consistent work.
The key ingredients for a PR attempt: consistent training over 8–12+ weeks that includes easy runs, speed work (intervals and tempo runs), and adequate recovery. Choose a flat, fast course in favourable weather. Pace the first half conservatively and push harder in the second half — a negative split is the most reliable way to PR.
If you’ve been stuck at the same PR for a while, adding structured speed work and strength training are usually the two biggest levers. For a deeper look at pacing strategy, see our 5K race guide or 10K time guide.
FAQ: PR in Track and Running
What does PR stand for in track?
PR stands for personal record — your fastest time ever at a specific distance in track and field or road running.
What is the difference between PR and PB?
PR (personal record) and PB (personal best) mean the same thing. PR is the US term. PB is used in the UK, Australia, Canada, and internationally. Some runners draw a minor distinction: PR for official race times, PB for any best performance including training.
Can you have more than one PR?
Yes. You have a separate PR for every distance you race — a 5K PR, a mile PR, a marathon PR, etc. Some runners also track separate PRs by surface (track vs road) or by season.
What other running abbreviations should I know?
Common ones include SB (season best), CR (course record), DNF (did not finish), DNS (did not start), BQ (Boston qualifier), and AG (age group).
How do I set a new PR?
Consistent training over several weeks including easy runs, speed work, and recovery. Race on a flat, fast course. Pace the first half conservatively and push the second half. Most runners see biggest PR improvements in their first 1–2 years of structured training.
Why PRs Matter More Than Placement
In most races, you’re not competing for the podium — you’re competing against your own history. That’s what makes PRs so motivating. Your finishing position depends on who else shows up. Your PR depends entirely on you.
Tracking your PR over time gives you an honest measure of whether your training is working. If your 5K PR was 28:00 six months ago and it’s 25:30 now, that’s clear, measurable progress — regardless of whether you finished 15th or 150th in either race.
It’s also worth knowing that PRs become harder to achieve as you get faster. A beginner might drop 3 minutes off their 5K PR in a single training cycle. An experienced runner might chase 10 seconds for an entire season. Both are equally valid achievements.
Our running coaching programmes give you structured speed work, pacing targets, and weekly progression — everything you need to run your fastest time yet.
Find Your Next Running Race
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