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Individual Variation of Bowstring Release in High Level Archery: A Comparative Case Study

机译：高水平射箭中弓弦释放的个体变化：一个比较案例研究

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Purpose. The muscle-contraction strategy between the predominant forearm and pull finger used in archery is defined as a response to the fall of the "clicker" by active contraction of the m. extensor digitorum (MED) and the gradual relaxation of the m. flexor digitorum superficialis (MFDS). However, one archer with a long-term high performance history makes use of an entirely different strategy, which is thought to have positive effects on her performance. The purpose of this study was to make a more detailed analysis of the contraction strategy performed by this particular top-level archer and to consider the advantages this strategy may have on bowstring behaviour after release. Methods. A high level (world-class) archer volunteered to participate in this study. The subject has been ranked in the top 20 in the world and as one of the top 3 archers in Europe for almost two decades. The subject has a personal best score of 1354 points (pts) in a qualification round as well as receiving 168 pts in an 18-arrow match. The subject engaged in a single test session consisting of 12 shots. EMG activity of the MFDS and MED were quantified. Results. The subject's MFDS was found to be clearly relaxed even ~ 100 ms after the snap of the clicker was heard. The subject also showed a gradual relaxation of the MED after the snap of the clicker. Conclusion. The study results found that this different type of contraction-relaxation strategy can be used in the drawing arm with success, as it may avoid causing a lateral deflection of the bowstring.
机译：目的。射箭中主要的前臂和拉指之间的肌肉收缩策略定义为通过m的主动收缩对“喀哒声”器掉落的响应。指肌伸肌（MED）和m逐渐松弛。浅指屈肌（MFDS）。但是，具有长期高性能历史的弓箭手使用了完全不同的策略，这被认为对她的性能有积极影响。这项研究的目的是对这个特殊的高级弓箭手所执行的收缩策略进行更详细的分析，并考虑该策略在释放后对弓弦行为可能具有的优势。方法。一个高级（世界一流）的弓箭手自愿参加了这项研究。该主题在近二十年来一直位居世界前20名，并且是欧洲前三名弓箭手之一。在资格赛中，该受试者的个人最佳成绩为1354分（pts），并且在18箭比赛中获得168分。受试者进行了一次包含12张照片的测试。定量了MFDS和MED的EMG活性。结果。发现被测者的MFDS明显松驰，甚至在听到喀哒声后大约100毫秒。在单击器响起之后，受试者还显示出MED逐渐松弛。结论。研究结果发现，这种不同类型的收缩放松策略可以成功地应用于拉丝臂，因为它可以避免引起弓弦的横向偏斜。

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