| Scapular rotation to attain the peak shoulder external rotation in tennis serve. | |
| | |
MedLine Citation:
|
PMID: 20142775 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
PURPOSE: The purposes of this study were (a) to describe the detailed movements of the shoulder complex during the cocking phase in tennis serve and (b) to determine the contribution of the scapular rotation to the peak shoulder external rotation attained at the end of the cocking phase. METHOD: Twenty tennis players performed flat tennis serves with the maximum effort, and three-dimensional kinematic data of the thorax, scapula, and humerus of the dominant side were recorded by an electromagnetic tracking device (Liberty; Polhemus) at 240 Hz. The humeral rotation with respect to the thorax (named as the resultant shoulder rotation) was decomposed into the scapular rotation with respect to the thorax and the humeral rotation with respect to the scapula (named as the glenohumeral rotation). The scapular rotation that contributed to attain the peak resultant shoulder external rotation was quantitatively determined, and the ratio of the glenohumeral external rotation to the scapular rotation that contributed to attain the peak resultant shoulder external rotation was computed to represent the scapulohumeral rhythm for shoulder external rotation. RESULTS: Of the three components of scapular rotations, the scapular posterior tilt was the primary component that contributed to the attainment of the peak resultant shoulder external rotation. The scapulohumeral rhythm for shoulder external rotation (scapular posterior tilt-glenohumeral external rotation) exhibited during the backswing phase was 1:2.3. CONCLUSIONS: The peak resultant shoulder external rotation was generated by a synchronized combination of the scapular posterior tilt and glenohumeral external rotation. A consistent pattern of three phases of the scapular posterior tilt and the glenohumeral external rotation that could be accurately modeled by three linear regressions was observed in preparation for the peak shoulder external rotation in tennis serve. |
| | |
Authors:
|
Shoji Konda; Toshimasa Yanai; Shinji Sakurai |
Related Documents
:
|
12535765 - The graded anxiety test: a novel test of murine unconditioned anxiety based on the prin... 19964455 - Emg pattern recognition control of multifunctional prostheses by transradial amputees. 17028585 - Force field effects on cerebellar purkinje cell discharge with implications for interna... 15112115 - Multijoint dynamics and postural stability of the human arm. 8988615 - How big is a gabor patch, and why should we care? 20852775 - Semiconductor-mediated photodegradation of pollutants under visible-light irradiation. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Medicine and science in sports and exercise Volume: 42 ISSN: 1530-0315 ISO Abbreviation: Med Sci Sports Exerc Publication Date: 2010 Sep |
Date Detail:
|
Created Date: 2010-08-20 Completed Date: 2010-12-13 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: United States |
Other Details:
|
Languages: eng Pagination: 1745-53 Citation Subset: IM; S |
Affiliation:
|
Graduate School of Health and Sport Sciences, Chukyo University, Aichi, Japan. skonda@hotmail.co.jp |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adolescent Biomechanics / physiology Humans Humerus / physiology Male Range of Motion, Articular / physiology Rotation* Scapula / physiology* Shoulder / physiology* Tennis / physiology* Thorax / physiology Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Fatigue-induced reductions of torque and shortening velocity are muscle dependent.
Next Document: Defining intensity domains from the end power of a 3-min all-out cycling test.