I still remember the time that I set foot for the first time the tartan. He was on the track of the “Hispanic” in Leon. Up to then for me was an exclusive area; that same track where from a very small I was approaching the fences of the precinct to observe how a few inches athletes were disciplined way his series and saw how they massacred for achieve their bests.
That first day, I remember nothing else enter the track, a young athlete (what age would? 10 or 12 years?) she stumbled in front of me and after realizing a good “morrazo” helped him get up. At that time, appeared his coach and I said in a low voice “poor, is the first day wearing shoes of nails”. And there was the moment where I had the first evidence of the existence of this type of footwear.
That same day, arriving at my house I began to search for information on these shoes and I found an article where Asafa Powell posed with an Nike Zoom AeroFly. They were spectacular, they had an very aggressive design and unbeatable aerodynamic appearance. Excited, I looked for where to find them and with the savings that had I went to Valladolid to buy them in a small shop in a neighborhood that had everything. The next day I went to my coach with a smile from ear to ear, and I told him ‘look Fran! I bought the best slippers; they are those of Asafa! you sound? “.” By the gesture of Fran, at that moment I realized that was not successful. He put his hand on my shoulder and told me something that I was fire-engraved: “Andreu, these are the best shoes for the best sprinter in the world.” You’re the best sprinter in the world, or those are the best running shoes for you. “Keep them, and who knows, in time might be able to use them”. But at that moment I wanted to hate him, Fran volunteered to accompany me to a Sports store and after an afternoon with hundreds of cross questions, we found the perfect shoe for me. It was on that day, when I learned and understood the basics to be able to choose a shoe nails well. Today I have the illusion of being able to share it with you.
As you know, there are 25 different tests in athletics, for which there are 11 types of different shoes (background, rollerblade, speed, fences, jump height, long jump, Triple Jump, pole vault, Javelin, weight throwing, discus and hammer, and the Olympic March). All of them have specific qualities to optimize performance. Well, today let’s focus generally on background/rollerblade, Cross and polyvalent (hurdles /velocidad/saltos).
The difference between them is construction. In order to understand a little more the functioning of nails sneakers first we must clear their parts:
Parts of the slippers of nails
- multi-purpose slippers: is a running shoe concept appropriate for the athletes who are new to track because of the set of technical qualities. Its sole is rigid bridge to tip with a plate thickness gradually, thus increasing the strength of lever in the development of the career. Of heel bridge material is flexible to remove stiffness, improve its adaptability and thus reduce the risk of injury from the beginner athlete. The plate is typically 5 to 7 enclosures that we hasn’t generally 6 mm long nails. It is a step that is a little excessive for middle-distance, but for tests such as speed, jumps or fences give you sufficient grip to start. The entre-suela, usually made of foam eva pressed at one sufficient density to absorb with guarantee supports career and at the same time protect the heel when attacking the fences in this mode. The Upper is usually composed of mesh mesh for maximum breathability. At the same time, the Assembly mesh and seams of the vamp and overlays helps that the weight of the shoe to be reduced and therefore consider it “flying”. A clear example of this type of shoe is the Kalenji en Start.
- cross trainers: is very similar to the previous one. The only difference is that material is much more resistant to avoid breaks in the Upper, and the density of the midsole is greater to protect over the foot of the irregularities of the ground. The collar is usually something higher to avoid kinks. With respect to its weight it is true that it tends to be a little heavier, but compared to flying running sneakers, these are still more light. Nails we use are directly dependent on the type of terrain on which we are going to exercise props. We will use 3 mm for hard ground and without mud, 9 mm, 6 mm for normal (dry or similar grass) tours with clay, 12 mm in areas with many mud and 15 mm for very slippery circuits such as snow or ice. Take a look at the Kalenji AT Cross.
- slippers half-Fund: ultra-ligeras slippersare, but if there is a technical concept that stands out above the rest, it is its dynamism. In general, a middle-distance shoe tends to have a system that favors the reactivity of the supports in the race (i.e. the speed with which support makes contact and take off from the ground). Therefore this type of shoes plays a perfect grip and dynamism to achieve optimal performance. The Upper is usually mesh mesh termomoldeada to achieve an “glove effect” and thus achieve zero seams, reducing the risk of scratches. In relation to the grip, nails tend to be 3 mm or 6 mm, without having to increase its length since this specialty in general does not require the explosiveness of other shorter tests. The Kalenji AT MID are an example, it is the shoe that the French record holder Sophie Duarte currently runs its tests on track.
In conclusion, most importantly, reading at what point of improvement are and adapt the type of footwear to avoid unnecessary injury that eventually passed Bill.
To all this, a year and a half after starting my career in the Athletics ended up wearing my beloved Nike Zoom AeroFly, and believe me when I say that to this day I keep them (practically destroyed the use) as a reminder of everything I learned directly or indirectly from them.