{"title":"细长器械投掷手臂运动的特点:标枪和棒球投掷的比较。","authors":"Mizuki Makino, Koichi Nakayama, Yuka Ando, Kenji Tauchi","doi":"10.23736/S0022-4707.24.15706-4","DOIUrl":null,"url":null,"abstract":"<p><strong>Background: </strong>In javelin, although many previous studies have examined throwing movements that can increase initial velocity, the characteristics of throwing arm movement an elongated implement have not been clarified. The purpose of the present study was to examine the characteristics of the throwing movement of an elongated implement by comparing throwing movement between a javelin and baseball.</p><p><strong>Methods: </strong>Twelve male javelin throwers were asked to perform a javelin throw (JT) and a baseball long toss (LT) twice. The three-dimensional coordinates of reflective markers attached to the athlete's body, javelin, and baseball were measured using an optical motion capture system. %Trajectory was used as an index to evaluate the degree to which the hand was moved linearly during the throw. A smaller value of this indicator meant that the hand was move closer to a straight line. The joint angles in the throwing arm were obtained by calculating the Euler angles between body segments. These data were used to compare JT and LT.</p><p><strong>Results: </strong>%Trajectory showed that JT was significantly smaller than LT. Significant differences in the joint angles of the throwing arm were noted between JT and LT.</p><p><strong>Conclusions: </strong>JT showed a kinematic pattern in which the hand was moved more linearly than in baseball long toss.</p>","PeriodicalId":17013,"journal":{"name":"Journal of Sports Medicine and Physical Fitness","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Characteristics of throwing arm movement for an elongated implement: a comparison of the javelin and baseball throwing.\",\"authors\":\"Mizuki Makino, Koichi Nakayama, Yuka Ando, Kenji Tauchi\",\"doi\":\"10.23736/S0022-4707.24.15706-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Background: </strong>In javelin, although many previous studies have examined throwing movements that can increase initial velocity, the characteristics of throwing arm movement an elongated implement have not been clarified. The purpose of the present study was to examine the characteristics of the throwing movement of an elongated implement by comparing throwing movement between a javelin and baseball.</p><p><strong>Methods: </strong>Twelve male javelin throwers were asked to perform a javelin throw (JT) and a baseball long toss (LT) twice. The three-dimensional coordinates of reflective markers attached to the athlete's body, javelin, and baseball were measured using an optical motion capture system. %Trajectory was used as an index to evaluate the degree to which the hand was moved linearly during the throw. A smaller value of this indicator meant that the hand was move closer to a straight line. The joint angles in the throwing arm were obtained by calculating the Euler angles between body segments. These data were used to compare JT and LT.</p><p><strong>Results: </strong>%Trajectory showed that JT was significantly smaller than LT. Significant differences in the joint angles of the throwing arm were noted between JT and LT.</p><p><strong>Conclusions: </strong>JT showed a kinematic pattern in which the hand was moved more linearly than in baseball long toss.</p>\",\"PeriodicalId\":17013,\"journal\":{\"name\":\"Journal of Sports Medicine and Physical Fitness\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2024-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sports Medicine and Physical Fitness\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.23736/S0022-4707.24.15706-4\",\"RegionNum\":4,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/2/6 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q3\",\"JCRName\":\"SPORT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sports Medicine and Physical Fitness","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.23736/S0022-4707.24.15706-4","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/2/6 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"SPORT SCIENCES","Score":null,"Total":0}
引用次数: 0
摘要
背景:在标枪运动中,虽然之前的许多研究都探讨了能够提高初速度的投掷动作,但尚未明确加长器械的投掷臂运动特征。本研究的目的是通过比较标枪和棒球的投掷动作,研究加长器械的投掷动作特点:方法:要求 12 名男性标枪运动员进行两次标枪投掷(JT)和棒球掷远(LT)。使用光学运动捕捉系统测量运动员身体、标枪和棒球上反射标记的三维坐标。轨迹百分比被用作评估手在投掷过程中线性移动程度的指标。该指标值越小,表示手的移动越接近直线。投掷臂的关节角度是通过计算身体各节之间的欧拉角获得的。结果:%轨迹显示,JT明显小于LT。投掷臂的关节角度在 JT 和 LT 之间存在显著差异:JT显示出一种运动模式,其中手的移动比棒球掷远更线性。
Characteristics of throwing arm movement for an elongated implement: a comparison of the javelin and baseball throwing.
Background: In javelin, although many previous studies have examined throwing movements that can increase initial velocity, the characteristics of throwing arm movement an elongated implement have not been clarified. The purpose of the present study was to examine the characteristics of the throwing movement of an elongated implement by comparing throwing movement between a javelin and baseball.
Methods: Twelve male javelin throwers were asked to perform a javelin throw (JT) and a baseball long toss (LT) twice. The three-dimensional coordinates of reflective markers attached to the athlete's body, javelin, and baseball were measured using an optical motion capture system. %Trajectory was used as an index to evaluate the degree to which the hand was moved linearly during the throw. A smaller value of this indicator meant that the hand was move closer to a straight line. The joint angles in the throwing arm were obtained by calculating the Euler angles between body segments. These data were used to compare JT and LT.
Results: %Trajectory showed that JT was significantly smaller than LT. Significant differences in the joint angles of the throwing arm were noted between JT and LT.
Conclusions: JT showed a kinematic pattern in which the hand was moved more linearly than in baseball long toss.
期刊介绍:
The Journal of Sports Medicine and Physical Fitness publishes scientific papers relating to the area of the applied physiology, preventive medicine, sports medicine and traumatology, sports psychology. Manuscripts may be submitted in the form of editorials, original articles, review articles, case reports, special articles, letters to the Editor and guidelines.