Most runners think their parkrun starts when the timekeeper says, “Go.”
It doesn’t.
If you’re trying to run your best 5K, your parkrun performance starts several minutes earlier.
It starts with your warm-up.
You can stand around chatting until the briefing finishes, walk to the start line and hope your legs wake up somewhere during the first kilometre.
Or you can arrive at the start already warm, mobile and prepared to run.
Your warm-up is your first advantage.
Don’t Spend the First Kilometre Getting Ready
Think about what you’re asking your body to do at parkrun.
One moment you might be standing around talking to friends.
A few minutes later, you’re asking your body to sustain one of the hardest efforts you’ll perform all week.
That’s a significant change.
Without a warm-up, the opening kilometre can become the preparation you should have completed beforehand.
Your breathing is catching up.
Your legs feel stiff.
Your stride doesn’t quite feel natural.
Then, somewhere around the first or second kilometre, everything finally starts working.
The problem?
You’ve already used a significant portion of your 5K getting ready to run it.
What a Warm-Up Is Actually For
A warm-up isn’t about burning calories or squeezing extra training into Saturday morning.
Its job is to prepare you for what you’re about to do.
An active warm-up gradually increases your heart and breathing rates and increases blood flow to the working muscles. (MUSC Health) Research also generally supports dynamic, movement-based preparation over relying on prolonged static stretching immediately before performance. (PubMed Central (PMC))
For parkrun, I want the transition to happen progressively.
Standing around → easy running → dynamic movement → faster running → parkrun effort.
That’s very different from:
Standing around → GO!
The Advantage Isn’t About Doing More
There’s an important distinction here.
A good warm-up shouldn’t leave you tired before parkrun starts.
You’re not trying to prove how fit you are during the warm-up.
You’re preparing yourself to demonstrate that fitness during the 5K.
Start with some easy running.
Add a little dynamic movement or mobility.
Then, if you’re planning to run hard, include a few short controlled strides to introduce some faster running before the start.
The faster efforts don’t need to be long and they certainly don’t need to be all-out sprints.
You should finish your warm-up feeling:
Warm. Loose. Alert. Ready.
Not:
Fatigued.
Why Faster Running Can Belong in Your Warm-Up
If you’re hoping to run your parkrun hard, jogging alone doesn’t completely replicate what you’re about to ask your body to do.
That’s where a few short strides can be useful.
You gradually accelerate, run quickly but under control, then ease back down and recover before repeating.
You’re giving your body a small taste of faster running before asking it to sustain a much harder effort.
There’s evidence that warm-up intensity can matter for 5K performance. In one small study of 13 trained male runners, a warm-up containing higher-intensity running produced a modest improvement in a subsequent 5000m time trial compared with a lower-intensity warm-up. (PubMed Central (PMC))
That doesn’t mean everyone needs the same warm-up, or that harder is always better.
It does reinforce the principle:
Prepare for the activity you’re actually about to perform.
Your Warm-Up Should Match Your Goal
Not every parkrun needs the same preparation.
If Saturday is an easy social run with friends, you probably don’t need an elaborate performance warm-up.
A little easy movement may be plenty.
But if you’re targeting a PB, testing your fitness or planning to run close to your limit, preparation becomes more important.
The harder you intend to run from the start, the more valuable it can be to arrive at that start already prepared for the effort.
Don’t Warm Up and Then Cool Down Again
There’s another trap.
You do a great warm-up.
You jog.
You complete your dynamic movements.
You do a few strides.
You feel fantastic.
Then you stand still for 15 minutes.
By the time parkrun begins, you’ve lost some of what you were trying to achieve.
Try to time your warm-up so the final part occurs reasonably close to the start.
Once you’re warm, stay gently active while you’re waiting.
Walk around.
Jog lightly on the spot if appropriate.
Keep your legs moving.
You don’t need to waste energy. You simply don’t want to become cold and stiff again.
Adjust for the Conditions
Your warm-up shouldn’t be identical every Saturday.
On a cold winter morning, you may need longer to feel ready. Keeping an extra layer on during the early part of your warm-up can also help.
On a hot summer morning, you may need less. You don’t want to start your parkrun unnecessarily overheated.
Your age, training background, running speed and personal preferences also matter.
There isn’t one magical warm-up routine that every parkrunner needs to copy.
The objective matters more than the exact formula:
Arrive at the start ready for what you’re about to do.
Make It Part of Your Routine
One of the best things about developing a regular warm-up is that it removes decision-making from Saturday morning.
You don’t have to wonder what to do.
You have a routine.
For example:
Easy running → dynamic movement → controlled strides → stay gently active → start.
Practise that routine regularly and you’ll learn how much preparation works for you.
You’ll know how long you need.
You’ll know how many strides leave you feeling sharp rather than tired.
You’ll know when to begin so you aren’t rushing to the briefing.
And on the mornings when you’re attempting a PB, you’re not experimenting.
You’re simply following a routine you’ve already rehearsed.
Your First Advantage Costs Nothing
Runners love searching for ways to improve.
Faster shoes.
A better watch.
New nutrition products.
More complicated training.
Some of those things can be useful.
But before worrying about marginal gains, make sure you’re taking advantage of something much simpler.
Prepare properly for the run you’re about to do.
Your warm-up doesn’t require expensive equipment.
It doesn’t add another training day to your week.
And it doesn’t require you to become fitter overnight.
It simply helps you arrive at the start better prepared to use the fitness you’ve already built.
Bringing It Back to Saturday
At your next parkrun, don’t think of the warm-up as something separate from your performance.
Think of it as the beginning of it.
Give yourself enough time to jog easily.
Add some dynamic movement.
If you’re running hard, include a few short controlled strides.
Finish close enough to the start that you can stay warm and ready.
Then when the countdown finishes, you don’t need the first kilometre to wake everything up.
You’re already prepared.
Your parkrun doesn’t start when the clock starts.
Your first advantage comes before it.
For a complete routine you can use before your next parkrun, get my free Arrive Ready: The Complete parkrun Warm-Up Guide: