Since the 1970s, plastic green grass floor mats were introduced into the football world, causing large-scale disputes in the international sports world. So far, the natural turf and plastic green grass floor mats are still prosperous in the sports world. debate. Until the mid-1980s, FIFA and the British National Sports Council jointly issued a unified standard for the quality evaluation of sports turf grass, which made the debate between natural turf and plastic green grass floor mat practical and objective criteria. So what effect do natural turf and plastic green grass floor mats have on football?
Influence of natural turf and plastic green grass floor mat elasticity on football
Due to the limited elasticity of the natural grass plant fibers in the natural turf football field, the overall elasticity of the football on the natural turf is small, and the height of the high-altitude ball or the rebounding ball after landing is not very high, which is convenient for players to catch, stop and control the ball. ball. However, the plastic green grass floor mat of the artificial turf football field is mostly made of plastic fibers, which determines its good elasticity, and the force of the football flying from high altitude or mid-air to bounce on it will also be great. This means that it is not easy for the player to catch, stop and control the ball if the high-altitude ball or the rebound of the ball is too strong during the game. Players are required to readjust their stopping positions and determine the rebound height and route of the football, which has an impact on the inherent skills and tactics of players.
The influence of two kinds of field friction on football
The plant grass fibers of the natural turf football field have little frictional force on the football, which determines that the football rolls faster on the natural turf and the rolling distance is longer. However, the chemical fiber grass of the plastic green grass floor mat ping football field has a large friction force on the football, and the ball is more astringent when it falls on the artificial turf, and the rolling speed is slow and the rolling distance is relatively short. The rolling distance can reflect the smoothness of the lawn surface. The measurement method is generally to place the standard game ball on a triangular measuring frame with a height of 1m and a 45° angle between the hypotenuse and the horizontal plane. The distance after the ball stops rolling, the longer the distance, the smoother the surface of the lawn, and vice versa, the rougher the lawn. The best rolling distance is 3 to 12m, and the acceptable range is when the rolling distance is 2 to 14m. According to the test, the rolling distance of the natural turf field is 4~15m; the rolling distance of the plastic green grass floor mat field is 1~10m. From the measurement results, it can be seen that the friction of the plastic green grass floor mat field is higher than that of the natural lawn field. The force is large, and the large friction force of the plastic green grass floor mat also forces the athletes to consume more energy under the same time and the same intensity of exercise, resulting in premature fatigue, which seriously affects the athletes’ technical and tactical performance.
The effect of two types of football fields on the joint injury of players
When we watch the live broadcast of the game, we can often see the picture of the whole piece of turf flying off under the fierce confrontation. Don’t think that this is because the turf is not strong. The root of the turf and even the take-off of the soil play a role in each joint. On artificial turf, at most some rubber particles fly, so the joints and ligaments will bear more stress in these intense movements, which will naturally cause strains and injuries. As mentioned above, the speed of the ball on the plastic green grass floor mat is faster and the rebound is higher, which invisibly speeds up the pace of the game, and the fast-paced confrontation will also increase the probability of injury to a certain extent. At the same time, many incoming balls have a shorter reaction time for the player, and may also cause some subconscious unconventional movements, resulting in injuries. However, the flatness of the natural turf we have come into contact with is difficult to compare with the plastic green grass floor mat, and joint damage can easily be caused due to the potholes on the ground; on the other hand, playing on natural turf will make it difficult for players to do it. Impulsive actions, such as sliding shovels, barbs, etc., actually increase the probability of injury.
The influence of the drainage function of the two football fields on football
The drainage system is the most important foundation of a football field lawn. The first thing to consider when building a football field is drainage. The drainage system of the plastic green grass floor mat includes above-ground drainage and underground drainage. The above-ground drainage is generally drained through a certain slope (0.2% to 0.5%). The site can also be set to be high in the middle and low in the surrounding area to facilitate the removal of accumulated water. In addition, it is necessary to choose sandy loam soil with good water permeability, which is conducive to water permeability. However, relying solely on ground drainage is slow, so more advanced football fields are equipped with underground drainage systems. The underground drainage system is generally designed with drainage pipes in the base layer. Drainage pipes are usually made of tile pipes, concrete pipes, and other materials. There are many forms of layout, and different layout densities are designed according to different rainfall. When the court is flooded, the water infiltrates from the permeable lawn cushion to the bottom of the base layer, and then is collected by the drainage pipe to the main pipe and flows out of the field; the drainage system of natural turf is the same as that of plastic green grass floor mat.
The influence of the lighting standards of the two venues on football
The lighting quality of a football field is mainly determined by the level of illumination, the uniformity of illumination, and the degree of glare control achieved. Athletes, photographers, and spectators have different requirements. The degree of glare caused by a lighting device depends on the luminous intensity and direction of the floodlight, the number of lighting devices, the position of the lighting devices in the field of view, and the brightness of the surrounding environment. There is a trend towards financial considerations in determining lighting installations. This is largely determined by the number of audience seats. The lighting standard of the venue depends on the visibility of the spectators to the athletes, not only related to the vertical illuminance but also related to the illuminance of the horizontal plane. Because the lawns of the two sites are different, the lighting standards cannot be the same.
The influence of the two venues on the team’s tactical play
Since the elasticity and friction of the plastic green grass floor mat football field are larger than those of the natural grass football field, the tactics that were originally set up have to be temporarily rearranged due to the reasons of the field. However, such tactical play has not been coordinated for a long time, which determines that the tactical play of the entire football team is affected, especially for teams that like long passes and rushing tactics, the plastic green grass floor mat ping football field is too large. Elasticity will cause changes in the trajectory of the football, which will seriously affect the success rate of tactical coordination; for some teams with poor physical fitness, the plastic green grass floor mat football field has greater friction on the football and the players’ football shoes. Therefore, athletes will consume more energy at the same time and the same intensity of exercise.
If fatigue occurs prematurely, the original tactical coordination will be ineffective. For technical teams who are accustomed to playing short pass coordination, The greater friction of the plastic green grass floor mat skin on the ball will affect the rolling speed and rolling distance of the ball, which in turn affects the player’s control of the rhythm of the game. There are advantages if there are disadvantages, plastic green grass floor mat has many advantages that natural grass can’t match, as we all know, unlike natural grass, which requires two days of maintenance to play a game, plastic green grass floor mat can reach all seasons, all-weather, 24 hours Uninterrupted use, and the maintenance cost in the later period is 0, and in the era of rapid technological development, the excellent plastic green grass floor mat has passed the FIFA certification standard, and its performance is infinitely close to the natural lawn.
The FIFA-certified plastic green grass floor mat has three indicators: the durability of the turf surface, the movement response of the football on the surface, and the movement response of the player on the surface. These indicators should be tested in the laboratory and the field. These indicators are selected in the hope that the data of the plastic green grass floor mat will be closer to the natural lawn, and the excellent plastic green grass floor mat will absorb shock, bounce the ball and roll and turn the value, etc. In terms of sports indicators, it can be very close.