英文摘要
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Dynamic visual acuity (DVA) is a potentially informative measure to resolve the ability of an object while there is relative motion between the target and the observer. There are closely related between dynamic visual accuracy and response with sports performance, especially gymnasts' dynamic visual acuity and movement performance. Therefore DVA is an important indicator of sport performance. In gymnastics, that is high-difficult, high-skill movements, gymnasts need a good DVA and dynamic visual reaction (DVR) to get higher score in the competition. During jump, tumbling gymnastics movements, It is particularly important for gymnasts to determine the spatial location accuracy and response with DVA. The purpose of this study was to investigate characteristics of dynamic visual acuity (DVA) and dynamic Visual Reaction (DVR) index during whole body rotation of gymnasts. Twenty gymnasts (8 male and 12 female) (whole subjects average age 22 years old) served as subjects. Multi-axis training instrument and Lab View program were used as tools. Each subject should test a Lab View static (no rotation) acuity test (60 items) and dynamic acuity test (60 items). While testing static visual acuity, subject not only stood and fixed Multi-axis training instrument but also investigated SVA index and SVR time. And then testing DVA, subject not only fixed on Multi-axis training instrument and rotating with 15 rpm speed but also measured DVA index and DVR time. The results showed that: (1) For the Gymnastic athletes, the range of DVA index is -3.333 to 5.263. (2) For the Gymnastic athletes, the range of DVR is-0.136~0.146. This study not only reflected characteristic of dynamic visual acuity in elite gymnasts, but also showed that the criterion of screening athletes' DVA range is .00 to 5.26, DVR range is-.067 to 0.146. Based on the principle of study, we can screen suitable athlete and provide more professional and efficient training for them to enable their Dynamic Visual Fitness Performance, It is also suggested to their coach and themselves as a reference.
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