One questions constantly perplexes me: why do my shoelaces always come untied? I think about this a lot because my shoes come unties a lot.
So what causes my laces to unravel?
The pictures illustrate my frustration. The jogging shoes make sense. Moreover, while I might be deceptively fast, it seems unlikely my average velocity can loosen laces, but apparently, running even at my speed can jostle laces. Makes sense. However, try explaining those house shoes! What could I possibly be doing to cause those laces to unravel? Am I strolling too briskly through my bedroom?
The “loose laces” conundrum is a global malady. Entrepreneurs continue looking for the shoelace replacement or accessory that will render the lace obsolete (and their bank account full). The trend reminds me of one of my favorite childhood gifts was Velcro shoes. Just grip and rip to tighten or loosen. No laces!
A quick Google search reveals pages of loose lace chat room discussions such as “Adults who Can’t Tie their shoes, why?” or “The Real Reason your Kid Can’t Tie Yet” dotting the internet. You can watch TED talks devoted to the topic. The world yearns for an effective solution to loose laces!
Thank goodness, scientists took a break from saving the world from disease and famine to focus on shoelaces. Mechanical engineers and scientists at the University of California spent over TWO YEARS observing one of their lucky colleagues running on the treadmill as well as their own shoes when just walking around the office. This resulted in an actual study titled “The roles of impact and inertia in the failure of a shoelace knot.”
So why do shoelaces come untied?
Well, the act of planting one’s foot carries amazing levels of force for starters. In fact, the study findings determined that the laces experience g-force pressure exceeding the force of a roller coaster. Such force from jogging we might surmise that laces unravel under pressure!
Yet pressure is only part of the equation. The article title includes the word “inertia” along with impact. What is inertia? A simple definition is “the tendency of a body to resist a change in motion or rest.” Therefore, an inert object like shoelaces could lie dormant or be in motion.
Nevertheless, the critical difference is the object is resisting change in motion. It could be a dormant object resisting any movement creating force or it could be a moving object going in a straight line fighting a left turn. My pre-teen bike riding self-experienced inertia more than once. My ten speeds barreling down a hill when I suddenly decide the best remedy is applying the brakes. The bike would stop but my body kept hurdling painfully forward. Inertia also causes cars moving too fast on a windy road to miss a curve, which explains why you should heed those yellow signs with arrows while enjoying country scenery.
But enough about those transportation modes. We need to get back to my running style. Bottom line, external force eventually unties my laces because they resist the change caused by my running or walking. That and my wimpy knots. Frankly, the double knot always works for me. Sorry mechanical engineers!
A brief summary of the causes for unraveling laces syndrome according to intrepid scientists:
- The laces experience extreme force from an external source (my running) which is applying pressure for the laces to move in whatever direction my awkward strides create.
- The laces resist the pressure to move from the external force. Specifically, the laces fight the pressure to change direction.
Now-this does not explain my house shoes. Running shoes yes. So there is probably an internal force which is I do a poor job tying my shoes.
Two things cause “The Great Unraveling:”
- The pressure I place on the shoes and laces.
- How the laces respond to the pressure
Of course, the shoes/laces have no skin in this game. I do. So, the response is mine.
- Double knots
Again, this is my default position and frankly, it never fails.
- Do a better job tying shoes
Scientific research unveiled the optimal shoe tying method that leverages the position the lace position at the top of the foot to maximize movement adaptability. Yes, I just wrote that sentence about tying shoelaces. It sounds like a NASA launch sequence. Still liking the simplicity of the double knot.
- Seek an alternative
I did opt for the Velcro option, which lost 80% of the reading audience. And companies are fast-tracking research and development departments to concoct the magical lace elixir. Again, the double knot remains my first option because it must be so much cheaper than digital age alternatives.
This illustration begs another question. Why do I spend so much time fretting over my shoelaces? How many people take time out of their day researching solutions to this perpetual conundrum? Granted, constantly tying shoes is annoying and time consuming. Bending over or kneeling is a pain. Perhaps the causes for unraveling laces are also the reasons other aspects of my life are constantly unraveling.
For example, consider the Christian walk. The g-forces of life exerting full power and my response is to call upon the full reservoir of resistance. This is how things go astray. How should we respond? Subscribe to the Wonkyfied podcast to learn how to respond when life comes unraveled.