Steel hook is an important part of footwear products. It is the "backbone" of shoes which is installed between the sole and the bottom of the shoe. It plays a role of bearing and balancing, and determines the stability and comfort of shoes.

The national standard committee introduced that in order to guarantee the quality of steel hooked core, China has made "footwear".

"Mandatory national standards", but in the implementation of standards, it was found that some testing organizations and manufacturing enterprises had different understanding of heels of high heels.

The height.

In order to unify the concept, the national footwear Standardization Technical Committee put forward the concept of "effective heel height", which refers to the difference between the heel height of the shoe and the thickness of the front part of the forehand, namely the height difference between the heel and the front palm under normal wear condition.

Experts warn that when choosing high heels, you can use your hands to press your shoes properly.

It's good to be soft and not deformed.

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The size of the shoe and the shoe last are the basic choice, but the shoe type of each shoe factory is different.

For example, Adidas's last is usually relatively narrow, and ASICs is usually relatively wide. Different brands may be half or half last, so they can't be judged only by size, or if they are actually crossed.

When the foot touches the ground, it moves on the inside of the foot with the medial side of the foot. At last, it slightly leaning back to the middle of the front foot. It may be completely moving inside the sole of the foot.

This situation is more common in runners with low arch or flat feet. It needs stable structure to support the medial arch of the arch. The shoes selected are mainly of stable type.

Excessive internal rotation refers to the over rotation of the foot, or the rotation of the foot when it is not supposed to rotate, for example, the late stage of the whole palm in the gait cycle.

At this point, the inner side of the foot will bear too much weight. When the runner advances, the load will be borne by the inner edge, not the front foot.

This can lead to instability of the feet, which will not only affect the efficiency of running, but also cause obstacles to running.

Runners with excessive internal rotation should consider running shoes with high supporting functions, providing enough rigidity for the inner side of the arch, and effectively improving the stability of the feet.

On the Internet, the way of judging the movement of the sole of the foot is often based on the arch of the foot. It can only be said that this is a general situation, and there are runners who are low arch but lack of internal rotation, or high arch but excessive internal rotation.

The actual situation is still judged by the wear of the sole or the movement of the running feet on the treadmill by professionals.

Running is a dynamic behavior. Don't talk on paper, choose shoes on the sole of your feet. In addition, Neutral (cushioning), stability (Stability, Structural Cushioning), motion control (Motional control), etc. shoes are classified or addressed to each shoe factory slightly different. When choosing shoes, you should pay special attention to it. You can browse to each shoe factory website first, note down the correct classification and try again.

With the change of running experience and physical quality, weight and movement of the sole can be changed. Every time we choose shoes, we should judge the basis of the recent wearing shoes and the feeling of running. We should make adjustments at any time, try different kinds of shoes, get the best protection for both feet, and also have the best running efficiency.