![]() The twisting of the trunk is crucial to flight time. A study reported that athletes using jumping discus throwing had relatively greater momentum of a thrower-plus-discus system along the vertical direction, resulting in shorter discus flight time. At the instant of release, the extensive twisting of the shoulders and the hip enables the energy to be transmitted to the discus through the throwing arm, allowing the discus to take flight. To successfully initiate a kinetic chain to throw the discus, the thrower’s trunk must reach a high rotational angular velocity in the vertical direction when spinning, which enables the energy generated by the lower limbs during swinging and spinning to be transmitted to the trunk. ĭapena investigated the force–energy conversion pattern of jumping discus throwing by analysing the relationship between forces, linear momentum, and rotational energy, discovering that in the initial double-support phase, a large pull–push horizontal force is generated, and at the instant of release, the linear momentum and kinetic energy generated by the thrower and the discus (regarded as two separate systems) contributed 7% and 12%, respectively, to the horizontal and vertical velocity of the discus, whereas the thrower’s trunk contributed 93% and 88% of rotational kinetic energy on the vertical and forward direction, respectively. In some studies, these terms are replaced by “jumping” (or “rotation”) discus throwing and “double-support” (or “standing”) discus throwing, respectively. Airborne-release refers to the athlete releasing the discus while in the air (i.e., with both feet above the ground), and grounded-release refers to the athlete releasing the discus with one or both feet on the ground. Researchers have noted that although the spinning movement performed before the release of the discus is essentially the same among discus throwers, the action performed following the instant of release of the discus can be divided into two categories: airborne-release and grounded-release. The athlete moves in a manner similar to hammer throw or rotational shot put but spins the body and releases the object differently. In conclusion, the current study demonstrated comprehensive kinematical analyses, which can be used to instruct the jumping discus throwing technique with duration and angle characteristics of throwing movement for athletes by coaches with videos.ĭiscus throw is a track and field sport that involves throwing a heavy discus in a spinning movement. Additionally, release velocity must be improved because throwing distance is directly proportional to squared release velocity. Based on the results, throwers should keep smaller the shoulder–hip twisting and the right anterior superior iliac spine (abbreviated: ASIS) in front of the right acromion (for right-handed throwers) from the instant the right foot lands to the instant the left foot lands, before the instant of the right foot lands keep the discus at a depressed position and reduce the time before discus release, particularly the time of the non-support phase and the second single-support phase. The captured images were processed using a motion analysis suite, and the markers attached to joints on images were digitized manually. ![]() ![]() Two high-speed digital cameras with 120 Hz sampling rate were synchronized to capture the movement. Eight male right-handed discus throwers who used to practice the jumping throwing technique were recruited as participants. ThrowsLab) and their children in Clayton.The purpose of this study was to explore the kinematical characteristics of jumping discus throwing. John currently lives with his wife Carol (Mrs. Over the past 7 years his athletes have won 2 Junior Olympic National Titles, achieved two top 5 finishes at the USATF Junior Outdoor Championships, has had 5 podium finishes at state, won 58 discus and shot put titles, broke a 42 year old NCS section record in Discus (205’ 7”), and 9 school records. In 2011 he became a full-time coach and currently coaches Track at Diablo Valley College. He was a two-sport athlete in high school (Football & Track) and played his college football at Santa Clara University and UCLA. He is certified by USATF as a level 2 coach, completed level 2 of Arete Throws Nation TCR™ system, and holds an NCACE Strength and Conditioning Coach Certification. This means every athlete gets a ton of one-on-one instruction, but we’re also able to attend to a broad range of skill levels.Ībout your Throws coach Coach John Fouts is the owner of ThrowsLab. We are very committed to keeping our coach-to-athlete ratio as small as possible.
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