Abstract
Recently, a great deal of attention has been paid to measuring technology for track-and-field. With the progression of the technology, the movements of sprinters have been captured and analyzed to improve their performance. It was found out that two complex skills, maximizing the horizontal ground reaction force and not twisting an upper body, required for sprinting faster. There was a lot of analysis proved this theory, but a little research focused on the method how sprinters will master these skills. Previous studies demonstrated that a design of training environment forcing subjects to do specific action would lead to enhancing their performance by adapting their movement to the situation. Therefore, this study developed a tool relieving selfweight and extending flight duration as a training environment that it is difficult to gain the ground reaction force and an upper body easily get twisted. The tool has the function to change the flight duration by exchanging rotary dampers. In addition, the tool has been designed to be easily carried and have enough strength for withstanding the impact during use. The result of this tool’s performance test suggested that the tool would induce the rate of the horizontal ground reaction force during a sprint to increase.
