This specific way of tying your shoelaces ensures they never come undone during a run but can be untied with one pull

The music was finally doing its job, my breathing had found a steady rhythm, and the path ahead felt wide open… until a familiar, absurd thwack of a loose lace smacked my ankle. I stopped-equal parts irritated and amused-bent down to retie the same bow for the third time, and felt my momentum seep away onto the tarmac.

On a nearby bench, an older runner clocked what was happening, gave a small grin and a slow head shake. “That’s not how you tie them,” he said, in the tone of someone catching you out. A couple of minutes later he showed me a shoelace knot that looked almost identical to my usual one-except this time the laces flatly refused to work themselves loose.

Back at home, when I was done, I tugged a single lace end and the knot released in one clean, satisfying pull. One tiny adjustment had completely changed the experience.

The invisible problem hiding in every run

Most people don’t abandon a run because of some cinematic injury. More often, they quit in their head-somewhere between a rubbish playlist, a stitch in the side, and yet another stop to sort out their shoes. Shoelaces seem laughably minor until you’ve had to pull up twice inside 5 km and your splits are a mess.

There’s also that quick flicker of panic when a lace comes undone near a kerb or on a busy path. One misstep, a small ankle wobble, that awkward little hop while you try to retie with one shoe half on. It’s more than a nuisance: it snaps your rhythm and drags your focus away from the run.

The odd part is how rarely anyone revisits the way they tie laces. Most of us do it the same way we learnt at about eight years old-on a classroom floor or in the kitchen-copying an adult’s hands and never questioning it again. Yet a microscopic change to that movement can stop your knot betraying you mid-stride.

One grey Sunday in London, I watched a local running group meet in the park: twenty people chatting, stretching, fiddling with watches. Instead of correcting posture or cadence, the coach walked down the line and crouched to inspect shoes. “Wrong… wrong… lucky… wrong,” he muttered, spotting weak knots in seconds.

He paused beside a runner in neon-orange trainers. “You’re the one whose laces come undone every time, aren’t you?” She laughed, slightly mortified. “How can you tell?” He pointed at her bow: the loops stood vertically, running from heel to toe, rather than lying neatly across the shoe. “That’s a granny knot,” he said. “It’s basically built to fail.”

Afterwards he told me more than half the group turned up tying that unstable version. It wasn’t about pulling harder or running faster; it was simply the wrong structure for constant movement. A tiny detail, quietly undermining miles and miles of effort.

Square knot vs granny knot: why runners’ laces keep coming undone

There’s straightforward physics behind the frustration. The everyday shoelace bow usually ends up as one of two knots: a balanced reef knot (also called a square knot) or the twisted granny knot. Visually, they’re almost indistinguishable. Under repeated impact, they behave like opposites.

With a square knot, tension is shared evenly across both sides of the lace. The bow sits horizontally across the shoe, and the loops resist being teased apart by the repeated slap and bounce of your stride. A granny knot, on the other hand, introduces a twist into the structure. Each footfall nudges it a fraction looser, and the knot gradually walks itself open.

Researchers at the University of California, Berkeley once filmed shoelaces on a treadmill in slow motion. The footage makes it look like a trick: each landing momentarily stretches the knot, then the swing phase whips the lace ends outward. Repeat that cycle hundreds of times and the knot eventually gives up. Change the knot, and you change what the forces can do to it.

The one-pull knot runners swear by (a secure square knot)

This is the quiet technique that runner on the bench taught me.

1. Start as normal: cross the laces and pull them snug.
2. Make your first loop (for many people this is the right lace, but either side works).
3. Here’s the key: when you wrap the other lace around that loop, do it in the opposite direction to the one you automatically reach for.
4. Pull the second loop through and tighten the bow.

The first attempt can feel oddly clumsy-like writing with your non-dominant hand. That’s normal. Once it’s snug, look at the bow:
- If the loops sit flat side-to-side across the shoe, you’ve made a secure square knot.
- If the loops run heel-to-toe, you’ve recreated a granny knot-reset and flip that final wrap direction.

To lock it in, tug the loops outward and slightly down, then give the lace ends a final firm pull so everything seats properly.

When it’s time to take your shoes off, you don’t need to wrestle it. Grab one free lace end and pull sharply outward: the knot collapses in a single smooth motion. Strong during impact, easy to undo afterwards.

Two mistakes trip people up when they try this: - They cinch the bow so tightly it bites into the top of the foot. - They rush, drift back into muscle memory, and accidentally tie the same old granny knot again.

Practise on the sofa before you head out, when you’re not sweaty, out of breath, or late. Watch the orientation of the loops rather than staring at your fingers.

And yes-you’ll occasionally forget and revert to habit. Let’s be honest: nobody rewires years of automatic movement in one morning. When you notice, don’t beat yourself up; just redo it and save your future self one more reason to swear at kilometre seven of a 10K.

“A good knot is like a good coach,” the park trainer told me. “When it’s doing its job you hardly notice it, but when it isn’t, you feel the gap immediately.”

A quick pre-run checklist

• The loops lie across the shoe, not pointing towards your toes.
• The laces are snug, but not pressing painfully into the top of your foot.
• There’s enough spare length that the ends don’t skim the ground.
• Do a fast test: hop on the spot five times. If the bow shifts, retie.

Why a tiny knot change feels bigger than it looks

Everyone knows the way a small irritation can hijack a day: a loose button, a flickering bulb, a phone charger that only works if it’s positioned “just right”. Laces that undo themselves mid-run sit in that same category-quiet, repetitive, motivation-draining.

Fixing the knot won’t turn anyone into an elite athlete overnight. What it does do is remove a reliable excuse to stop. It’s one less interruption precisely when your brain is searching for reasons to cut things short. Maintaining an unbroken rhythm can boost confidence-especially on those heavy-legged days when everything feels twice as hard for no obvious reason.

There’s also a subtle mental shift when you get this right. Instead of treating your shoes as random gear that either behaves or doesn’t, you start seeing them as part of a setup you can manage. That sense of control often spreads: better warm-ups, calmer pacing, more deliberate recovery.

And on group runs, it’s oddly social. Someone notices the horizontal bow, asks what you’ve changed, and five minutes later you’re swapping race stories, injury lessons, and playlist recommendations. A small technical tweak becomes a human moment-often the sort of moment that keeps people turning up.

Two extra things that help your laces behave

Even with a proper square knot, your setup matters:

• Check lace condition and length. Old, glossy laces can slip more easily, while excessively long laces add extra “whip” that encourages loosening. If your ends regularly flap your ankles, consider shorter replacement laces.
• Match tension to comfort. A secure knot shouldn’t mean crushing pressure. If you get numbness or hot spots on the top of the foot, loosen the lower eyelets slightly and keep the knot snug rather than brutal.

Key points at a glance

Key point	What to look for	Why it matters to you
Spot the “bad” knot	Bow aligned heel-to-toe = unstable granny knot	Lets you identify, in seconds, why your laces keep coming undone
Switch to the square knot	Reverse the direction of the final wrap around the loop	Turns a childhood habit into a reliable tool for running
Quick test before you set off	Check loop orientation + do a short hopping test	Cuts mid-run stops and reduces the chance of a trip or ankle tweak

FAQ

• How can I tell I’ve definitely tied the “good” knot?
  Use the visual cue: a secure square knot sits sideways, with the loops lying left-to-right across the shoe. If the loops point towards your toes, you’ve almost certainly tied a granny knot.

• Does this work with elastic or stretchy laces?
  It does, although it feels slightly different. Stretch laces naturally smooth out tension changes, so the improvement can be less dramatic, but a balanced knot still helps them stay put over longer runs.

• My hands aren’t very nimble-what’s the easiest way to learn it?
  Practise slowly while seated, with no time pressure. You can also search for “Ian’s secure shoelace knot” and follow the steps; it’s more structured while still releasing with a single pull.

• Should I add a double-knot on top of this method?
  For most road running, usually not. On muddy trails or very long ultra-distance days, some runners add a gentle double knot, but the one-pull square knot is typically enough on its own.

• Does any of this matter if I only run a few kilometres?
  If your laces never loosen, you may not notice a difference. If you’ve ever had to stop even once on a short run to retie them, this small change removes a disproportionately annoying problem from your routine.