Experimental research and analysis

1. Luyi Chen, etc., with China Institute of Sports Science and equipment - Germany novelpedar plantar pressure distribution measurement system on human foot in three different states (ie, bare feet, wearing shoes of ordinary shock, wear Full length cushion shock shoes) jump process was repeated for foot pressure, pressure distribution analysis. 2. The experimental results of the three 3D-MVP chart (average plantar pressure distribution in three-dimensional map) shows the human body naked foot (Figure 1), wearing sports Cheap Air Shoes earthquake a (Figure 2), wearing sports shoes earthquake b (Figure 3 ) three state jump process for continuous human plantar pressure distribution. Experimental images from the above 1.1 can be clearly seen the body in the qualitative jump, the bare foot under foot all the main landing point in the forefoot and toe points each metatarsal and toe point of 2,3-away section of the average pressure significantly higher than other parts of the foot, especially the great toe is the average pressure of the highest parts of the feet, the point of the great differences of the average pressure distribution, which is the process of human vertical jump, landing and take-off when the buffering capacity to face the foot of the reaction said most of the role of acting on the above points, consistent with natural law under the conditions of biomechanics. Image 1.2 by qualitative analysis can be found in all metatarsal forefoot and toe points and toe point of 2,3-away section of the average pressure values higher in other parts of the foot, toe or foot maximum average pressure of the site, But the pressure has reduced the points on average, significantly smaller differences in the distribution. Further qualitative analysis of Figure 1.3, can know the average plantar pressure distribution in Figure 1.2 have similar, but the average pressure distribution from the regional point of view, arch and heel pressure distribution is more, with a mean pressure value to a better equilibrium. 3. Experimental study concluded on bare feet and shoes of different types of shock state of the human body during the continuous jump average plantar pressure distribution analysis and comparison of qualitative research, we find that shoes can reduce the shock jump outside the human body when foot shock, reducing injury to various parts of the foot and lower muscles, tendons and nerves, blood vessels under pressure, improve athletic ability has no small effect. In addition, different types of shock shoes foot shock effect on the human body it has a special difference. IV, Conclusion 1. The functional requirements of sports shoes. Performance requirements of the sports shoes should focus on two aspects: First, the function to meet exercise; The second is to reduce physical exertion in athletes while tendon from the bone of the foot protection. Including sports shoes: (1) light: the premise of ensuring reliable shoes reduce the quality and reduce energy consumption. (2) ventilation: shoes have good air permeability, water permeability. To do this the one hand, start from the material, the other was washing cycle suction automatically end structure. (3) flexibility: shoes need to have good flexibility, not only helps to get a good bounce, can play an energy-saving, energy storage role. (4) Shock: The shock absorber damping system functions to reduce the impact of exercise on body strength. Shoes to match the shape of cavity and foot, but also improve the damping effect. 2. Sneaker shoe material requirements. (1) Outsole: sports footwear sole function is to protect the soles of the feet, and play to help spring, brake, skid, and shock absorption and other effects. Commonly used material is all plastic, plastic, rubber and PU, etc.. (2) in the end: most have been extended within the base material for EVA as the main body of the porous body. (3) shock system: general materials, including gases (air, helium, etc.), liquid, plastic, plastic, all plastic, etc.. (4) use the service: The main materials used are natural leather, cotton canvas, nylon fabrics, synthetic leather, composite fabrics. 3. Sports shoes sports shoes and sneakers drawbacks of relatively flat soles, plastic large, flexible, young people run, jump up to a certain buffer effect, because the very young students like. But the long-term wear is simply this: As the shoe temperature and humidity increase, easy to change somra foot ligament length, foot becomes wider, over time become flat feet. Sports shoes are mostly rubber material, plastic, sponge, nylon, canvas, etc., poor ventilation, Khan feet long in this "closed" environment, and easily legs moss, dermatitis, eczema and other skin diseases. Sports shoes or shoes with almost no Flats, it can not guarantee that the average distribution of the body center of gravity in the whole foot, not the body muscle ligaments, bones and spine to maintain proper position and working conditions, young people wearing the body after the shift in the focus because , the uneven distribution of foot forces there, will affect the gait, such as long-term in such adverse conditions, will affect the physical development of young people