The word pole can be defined in two ways, the first is to refer to a large stick that ends in a metal point at one end, used mainly to move or guide animals in the field. On the other hand, there is the pole or pole, which is a long and flexible pole that is used by athletes during pole vault practice, this pole allows them to gain momentum to jump on a bar placed several meters high.
The pole used in sport is a bar whose dimension is between 4 and 5 meters. Throughout the history of athletics, poles have been made of various materials, at first they were made of not very elastic materials, such as metal and wood, later they were made of bamboo, this material caused a lot of fury within the pole vault practice as it could bend. It was not until the sixties when the pole made with carbon fiber began to be used, this material gave the bar an incredible flexibilityLater, bars made of carbon fiber and fiberglass were made, where the central part of the rod was made of fiberglass, to make it more flexible in that area, and the ends were made of carbon fiber, since this part did not need so much elasticity.
The polecats are numbered to distinguish them. For example, the first numbers reflect the length of the rod, and it is measured in meters, that is, it represents the length from one end to the other of the pole, the second number represents the resistance of the rod and is measured in pounds, indicating the maximum weight that the pole can support. In order to determine this weight, some preliminary tests are carried out where weights are placed on it until it breaks. The third number represents flexibility and is measured in millimeters, this number indicates the effort that has to be made to more or less bend the rod.
For example, a 3`30 / 180/20 pole would be a pole that measures 3.30 meters and is the most recommended to carry a weight limit of 180 pounds (81.6 kg) and that when adding the standard weight bows by 20 millimeters.
