Biological Cybernetics

, Volume 90, Issue 3, pp 176–190 | Cite as

Coordination modes in the multisegmental dynamics of hula hooping



In hula hooping, organized motions of the body keep the hoop in stable oscillatory motion parallel to the ground. We examined the hypothesis that the multiple degrees of freedom (DF) of the lower limbs in producing the oscillations are resolved into a few control DF. The Karhunen-Loève decomposition was applied to the kinematics of the lower limbs in three experiments in which oscillation amplitude and frequency were manipulated. Kinematic variance was accommodated by two modes whose relative contributions varied with task parameters. Complementary analyses of interjoint Hilbert relative phase suggested a lower-limb organization into a vertical suspension mode and an oscillatory fore-aft mode. These modes might stabilize the hoop’s angular momentum by controlling, respectively, its vertical and horizontal components.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  1. 1.Sensory Motor Neuroscience GroupBehavioural Brain Sciences CentreUK
  2. 2.Center for the Ecological Study of Perception and ActionU-20 University of ConnecticutUSA
  3. 3.Haskins LaboratoriesUSA

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