Biology of Sport
pISSN 0860-021X    eISSN 2083-1862
Archival Issues
Volume 34, 2017
Volume 33, 2016
Volume 32, 2015
Volume 31, 2014
Volume 30, 2013
Volume 29, 2012
Volume 28, 2011
Volume 27, 2010
Volume 26, 2009
Volume 25, 2008
Volume 24, 2007
Volume 23, 2006
Volume 22, 2005
Volume 21, 2004
Volume 20, 2003
Archival Issues 1984-1998
Search
Newsletter
Information for Authors
Special Information
 » 
Journal Abstract
 
Frequency effect on selected characteristics of the elbow joint cyclic movements
J Zawadzki
Biol Sport 2006; 23(2):195-208
ICID: 891380
Article type: Original article
IC™ Value: 9.29
Abstract provided by Publisher
 
The subject of this thesis are relationships between quantities describing the behaviour of the human upper limb during cyclic movements in the elbow joint. Seventeen students took part in the experiment. The examined subjects’ task consisted in performing cyclic flexion-extension movements in the elbow joint with the highest frequency within the range of movement placed symmetrically around the middle angle α0≈1.8 rad.Movements were realised in 5 ranges with amplitudes αm from 0.2 to 1.2 rad. The dependence of joint angle on time was measured and then angular velocity ω(t), angular acceleration ε(t) and external power P(t) were calculated from the definition equations. The existence of a clear relationship (negative correlation) between amplitude and frequency of the forearm cyclic movements was found. Moreover, the strong resemblance of examined movements and harmonic oscillations was noted. It manifested itself in the character of observed kinematical dependencies and in the quantitative relations between them. Based on the above observation the dependencies of movement amplitude αm, angular velocity ωm, angular acceleration εm and external power Pm on movement frequency were determined and described using some simple equations.

ICID 891380
 
FULL TEXT 382 KB


Related articles
  • in IndexCopernicus™
         power [3 related records]
         Amplitude [0 related records]
         Frequency [7 related records]
         Elbow Joint [20 related records]
         Cyclic/periodic movements [0 related records]


  •  

    Copyright © Biology of Sport  2017
    Page created by Index Copernicus Ltd. All Rights reserved.