Roller skates are composed of blades, blade tubes, front tool rest, front tool rest, front tray, rear tool rest and rear tray. The blades of modern advanced speed skating knives are mostly made of high-quality high-carbon steel, and other parts are made of light alloy. The soles of speed skating shoes are hard leather, and the skates are fixed on the soles with screws or rivets.
The blade is only 1 mm wide and 40 to 45 cm long. This is polished by hand. Roller skates are polished on a large flat stone with special tools. Nowadays, it is more and more popular to use diamonds to sharpen the blade, but only top players can afford such an expensive fee. The diamond-polished ice front is almost perfect, which is very important for high-speed sliding.
Speed skaters wear special jumpsuits, which are warm and light, and the most important thing is to reduce air resistance. Ski suits must undergo a series of rigorous wind tunnel tests.
Speed skating: At the beginning, the athletes take a squat posture to produce a strong explosive force. In the long-distance race, a runner can put one or two arms behind his back to increase aerodynamic force and save physical strength. Players are divided into two groups, and the passing arrangement and starting order are randomly determined by drawing lots. After the starting gun sounded, two players in the same group slid counterclockwise around the ice track and reached the finish line first. Because the speed is too fast, the results are often very close, and it takes one hundredth of a second to work out. Players in each group are allowed to run first, and if a player fouls for the second time, he will be disqualified. After each lap, the players of both sides exchange the positions of the inside and outside lanes in the exchange area to ensure that the total distance between the skaters of both sides is the same. Players outside the driveway have the priority to change lanes.
In the short track speed skating competition, athletes can surpass their opponents at any time without violating the rules. The top two in the group advance to the next round until the last four are decided.
In the men's and women's relay race, each team has four athletes, and each team decides how many laps each athlete should skate, but the last two laps must be completed by one person. It is unusual for any athlete to complete more than 1.5 laps, which means that an athlete may have to take part in 7 or 8 relays. Different from the baton used in ordinary track and field competitions, the relay athlete of short track speed skating only needs to push the next teammate to start after arriving at the relay venue.