On July 26, Beijing time, foreign media reported that swimmers always try to find the best swimming posture, and then the complex physical nature of running water leads to research in this area always lagging behind the most advanced technology. However, the latest technology has begun to meet the needs of swimmers and coaches, or may help improve the training rules of the next generation of Olympic athletes.
Each part of the competitive game-taking off, turning, and flapping water, can be analyzed separately. Swimmers of the same size determine the difference in speed to a large extent by maximizing the thrust generated when flapping the water. "What the swimming coach wants to know is how much thrust the swimmer has generated," said Timothy Wei, an engineering professor at the University of Nebraska-Lincoln.
Wei is developing a system capable of shooting high-speed videos of swimmers while swimming, tracking every point on the body. By measuring the swimmer's speed in each frame, it is possible to estimate the swimmer's acceleration and the thrust generated by each movement. The whole system is very simple, the coach can get fast and accurate data. Currently the best way to measure the thrust generated by swimmers per microsecond is to tie them to a measuring instrument and let them swim in place. The data obtained in this way is incomplete because the swimmer is not really swimming in the water. The new system developed by Wei allows swimmers to swim in the lane as they do in competitions. Wei hopes that after the London Olympics, his new technology will be tested on Olympic athletes in the United States.
In 2008, Wei worked with the American sports team to study the popular dolphin kick. He uses a computer and a high-speed camera to track the movement of the water surrounding the swimmer in the water. This technique is called digital particle image velocimetry. These splashed tracks provide information on how much thrust a freestyle swimmer can generate, and how these thrusts are generated, but this is a slow and computationally intensive process. Although Wei's simplified motion tracking system does not tell him which part of the body the swimmer's forward movement comes from, it can determine the net thrust generated by each subtle swimmer.
"You don't need to wait for scientific research, or you will be 20 years behind today." Mike Portmore, head coach of the University of Michigan Swimming Team, said. He believes that the evidence of this new technology exists in a fast time and where it ends for the first time. The first combination of scientific and competitive swimming began in the 1960s with legendary American coach James "Doc" Consellman. "Doc is the originator, he used video and different methods to improve the skills of swimmers." Portermo said.
The latest study will not directly affect London Olympic athletes, but it will eventually help improve the performance of the athletes and may be able to break the world record. "Research is only part of the whole process and part of improving and acquiring relevant knowledge." Russell Mark, consultant of the American Swimming Team, said, "Success is also a small part of research, or can help understand how to swim better."
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