Is The Zuck’s Sub 20 any good?
Source: Results
First up, a Sub20 5K time is not trivial for any newbie athlete of any age. For many athletes, it’s a very worthy goal and achievement.
Mark Zuckerberg is a 38-year-old male and so that makes his age-graded time 69.1% and as my little spreadsheet shows below, my rating of that is ‘Quite Good‘ but certainly not anything to make national or international news. Matt, the European Head of Google who lives around the corner from me is a former Olympic rower and a competitive vet rower…I think that might mean that Google beats Meta/Facebook on the impressive-CEO-sport count. That said, Matt’s parkrun age grade percentage is about 60%, so maybe not.
For Zuckerberg’s time to be more noteworthy it would need to be more like 18:00. That’s a good 90 seconds faster and considerably harder to achieve. A more sensible, ultimate mark for anyone to aim for is an 80% age graded performance which, for many casual but committed athletes, probably represents the pinnacle of what they can ever achieve.
To get to Mark Zuckerberg’s time it definitely helps if you are younger and male. And, of course, it helps if you are fit. Most people should be able to get to a 70% age-graded performance by training 3 times a week. It might take you a while but you’ll get there. Sadly, you won’t make international news in the process unless you happen to run a large company and also tweet about it.
The Zuck’s performance is similar to that of an 18-year-old male, shown here
However, for a 60-year-old male, it’s quite a different kettle of fish. Indeed for a 60-year-old, it is extremely difficult
Likewise, for a 30-year-old female, a 19:34 time IS good. Very good, in fact.
And if you are a 60-year-old female, then. Wow
Here are some times by British Triathlon Team Manager, Joan Lennon. She’s more of a speed walker but, as you can see, she once got a 90% age-graded time. Pretty awesome & very inspirational!
More: Joan Lennon on parkrun
So how do you do it?
The answer of course is to train more effectively. Here are some links explaining in more detail how hard a sub20 5k might be for you, a plan to achieve one and some tips on boosting your performance to the max for a race within the next 10 days or so.
*100* Tips to Run a Faster Parkrun PB – How to Get Your 5K PR This Weekend
a Sub 20 parkrun – how long will it take me to run 5k in less than 20 minutes?
Training plans and performance guides for every level of parkrunner are indexed in the parkrun hub.
Last Updated on 27 May 2026 by tfk the5krunner
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- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
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- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
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- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
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Home and indoor training
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Health, recovery and sleep
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tfk is the founder and author of the5krunner, an independent endurance sports technology publication. With 20 years of hands-on testing of GPS watches and wearables, and competing in triathlons at an international age-group level, tfk provides in-depth expert analysis of fitness technology for serious athletes and endurance sport competitors. See the gear tfk uses. ID
Well, it might not be good among athletes, but it is definitely good for office workers, especially in management.
For my curiosity – is a parkrun a specific type of run, or just any 5k?
over a million different people have done a parkrun which are organised, free Saturday morning 5k runs in parks
Sub 20min is an excellent time from my stats. My local parkrun of 200 people: only 2 broken the 20min time. I would say the reality is that 20min is probably 95% absolute percentile. I can’t ever see 30% of people on a parkrun break 20mins.
the average completion time for a parkrun is falling because it is attracting a wider range of abilities (which is great)
some parkruns are considerably harder than others https://the5krunner.com/2017/11/02/parkrun-hardest-easiest-courses/
76 people did sub20 at bushy https://www.parkrun.org.uk/bushy/results/latestresults/
I think the parkrun results are a particular subset of the running community. Out of a national population, or people that run in general I think 5k times are a lot slower. I think being top 10% of park runners would be the equivalent of top 1% of people that run or even top0.1% of global society. I think anyone that can 5k, let alone 20mins is a good runner.
yep, fair enough
we all define these things differently.
the age group %ages are an absolute measure of how good your time was (excluding course conditions). my textual interpretation over and above that is mine, but i think reasonable in the context of what mere mortals can achieve.
What system is age grading based on? Quite important. And relative..
Are these parkruns ever organised in age graded starts?
The Sportsworld doesn’t Excel in Innovation. Look Alone at the use of pace instead of speed…..
age grading, iirc, is based on the %age of the best ever time for someone in that age group globally.
there can be >2000 starters but they are essentially ‘fun’ events taken seriously by a minority
pace /speed…here we go again ! Most serious runners would use pace (per lap or per km) over speed.