Last summer, the three words stepping on the appeared as black words in the slipper circle, and as long as these words were written in the product title, they could sell more than 1,800 pairs.
Image source: pinterest
One of YOKA Jun's girlfriends also bought a pair at the time, and after wearing it for two days, she took a taxi to my house and asked me to step on it to try.
When she took out the pair of monochrome streamlined sandals with an "EVA styrofoam all-in-one" shoe with a five-centimeter-thick sole and twisted it into a twist with excitement, I knew that this summer I would see this pair of shoes on the feet of countless people.
Image source: gif screenshot
Let me try? Yes.
What is the specific experience of this sense of? When the soles of my feet came into contact with the extra thick styrofoam, the soles of the shoes gradually thinned with the pressure of my weight, and almost for a second, the whole person steadily sank.
Then, I felt the weak tension and the sides of the soles of my feet wrapped, and there was a warmth like fresh cow dung soaking the soles of my feet – this is the burning foot sensation caused by styrofoam, and some people are extremely sensitive to this, unfortunately I am one of them.
Take the first step, feel that your feet are dealing with the air, and there is no one to rely on;
The second step, feeling that the cow dung has been stepped on softly, the whole person falls into a silky ghost;
In the third step, I only heard a "Gabaer" sound of the ankle joint, and my feet were broken.
I really did it and I passed away.
Image source: IC
Watching my girlfriend change into "stepping shoes" and continue to jump in Duang Duang, I can only complain that the mountain pig can't eat the chaff with the habitual poor foot.
But a few months later, she suddenly sent a message saying that "there is something wrong with the ripple cover", and I realized that things are not simple.
Simply put, it was because she really liked the feeling of stepping on the shoes and wore them to and from work all summer, until one day when she was playing ball, her feet fell to her knees.
It is conceivable that when I went to the hospital, I also went wearing shoes, and the doctor silently wrote in the medical record after seeing the X-ray:
Cruciate ligament injury
Functional flat feet?
In addition to telling her to recuperate, the doctor kindly reminded her to change into a pair of comfortable shoes.
Obviously has a silky experience like stepping on, isn't it comfortable shoes? Probably not really.
This kind of one-piece shaped heelless home shoes do not have a complete protective function like the sneakers or casual shoes we often wear every day. In addition to decoration, at best, when encountering real, it can help us avoid some filth.
And the shoes that are truly exquisite and scientifically designed, there is a high probability that the sole will not be a material.
If we cut open a pair of shoes, we will find that the sole is divided into at least two layers, and often divided into three layers.
Outsole (outsole):
The outsole is the outermost layer of the shoe touching the ground and needs to be wear-resistant, non-slip, resistant to construction, and supportive. The outsole is generally made of strong rubber material, and synthetic rubber is more widely used than natural rubber;
Some shoes (even sneakers) also use leather soles.
The characteristic is that it is very breathable and comfortable, but if it comes into contact with water and soil for a few days, it will hit the street. This is also the reason why many gold shoes made of pure leather need to be bottomed out to walk on the road of ordinary people' prosperity.
Insole:
The insole is in direct contact with the sole of the foot and can be understood as the insole part. Some shoes have a midsole that is formed in one, and some insoles that lack comfort and will add a removable insole.
Midsole:
It is the layer of structure between the outsole and the insole. The performance provided by the midsole is 80% of the full feeling that a pair of shoes can give you. The midsole is on top of the outsole and gives the foot thoughtful support, cushioning, and rebound.
Support: Stable midsole structure, making the pace more stable.
Cushioning: When the human body gives the ground a force of 2-4 times the weight, the ground will also have a corresponding reaction force, and the midsole will resist this force by force and deformation.
Rebound: After the midsole absorbs the reaction force, the rebound force given to the body makes the movement easier.
Originally, the midsole was made of PU (polyurethane), but due to the excessive weight, most of the current popular midsole uses EVA material - this is an ethylene-vinyl acetate copolymer, which appears bubble-like after high temperature, QQ bullets, has a certain elasticity and cushioning effect.
In recent years, through the updating of raw materials and the improvement of shaping technology, the midsole has provided players with more accurate choices for various sports.
With the treatment of these details, we have achieved the ability to run and jump.
Most of the shoes use EVA throughout, which has neither the protection of a rubber outsole nor the transition effect of the insole. Blindly soft, pure and pure without talking about martial virtue.
Looking at the foot photos below, it is not difficult to find that in order to cope with the necessary walking and running and various sports in daily life, all parts of our feet have their functions.
For example, when we are doing a basketball side slide, the point of force on the foot may look like this in the following picture*:
Image source: Reference 1
And when shooting, it becomes like this:
When playing football passes, the force point is as follows:
The strength of the forefoot-arch-hind paw is indispensable.
And once deeply involved in the stepping on the circle, the arch will be finished.
Without enough strength to undertake the arch, the bridge that can guarantee bounce and reduce pressure will collapse more and more, and it is likely to become a "acquired flat foot".
Without the arch of the foot, the foot begins to turn inwards, leg deformation, ligament strain, and the injury spreads from the soles of the foot to the ankles and finally to the knees.
Clinical scholars generally believe that if the position of the foot is improperly adjusted and excessively varused, the heavy and frequent load impact may cause foot damage to the athlete. Scholars in the field of sports biomechanics and motion engineering believe that the structure of sports shoes can effectively control the speed and amplitude of instep activity in motion on the basis of a large number of experimental data. *
In fact, the marketing of the concept of stepping on the comes from functional sneakers.
How can you make your jojo more comfortable when you're running? This is the unsolved mystery of running laps. The originator of the sense of stepping on that YOKA Jun can find is Asics' GEL series, and if there is a big god who understands earlier stepping shoes, please add it.
For people who are habitually weak,this pair of "stepping shoes" can be said to be very stable.
In recent years, many sports brands have begun the "mid-bottom revolution".
EVA
Although various new black technologies are proliferating,
EVA is still the most popular midsole material today,
Quite a few professional running shoes are still using it,
For example: Saucony PWRRUN
Image source: Brand
E-TPU (expanded thermoplastic polyurethane)
E-TPU，
It is made of TPU particles foamed by high pressure and high temperature.
It is characterized by excellent resilience, no deformation, and comfortable wearing.
The most famous E-TPU midsole shoes,
Yes: Adidas Boost
Inflatable EVA
In the manufacture of this material,
Gases such as nitrogen or carbon are injected into the midsole,
or add other polymers to EVA,
to achieve practical results.
Such as: Puma Nitro
PEBA (Polyether Block Amide)
PEBA on the same polymer,
using two different chemicals (polyether and polyamide),
Make the midsole both flexible and strong.
Such as: Nike ZoomX
In addition to choosing a good pair of shoes, you must also master the correct walking and moving posture. If you have been tossing and turning with the wrong movements in your life, the best shoes can only delay the occurrence of limb injuries.
In fact, not losing oneself in the soft "dung pit" and walking upright are the same requirements for both shoes and people.
bibliography:
[1] Zhang Wei: Biomechanical study of foot movement in different special characteristic movements. Master's thesis of Beijing Sport University. April 2004.
PS: The pictures in this article come from the Internet, if you have copyright questions, please contact us in time.
Written/Curated by: MIDNN
Typography: A red hair
Producer: GaGa
Wear the right shoes and go the right way