Fundamental characteristics of human limb electrical impedance for biodynamic analysis

Takao Nakamura, Y. Yamamoto, T. Yamamoto, H. Tsuji

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The paper describes the use of human-limb impedance for biodynamic analysis. The change of human-limb impedance during movement was measured, and was found to be related to kinematic and kinetic parameters. Strong relationships were found between the velocity of change of the forearm impedance and the angular velocity of the elbow joint (correlation coefficient r=-0·97), between the change of foream impedance and the acceleration of a human limb (r=0·86), and between the change of forearm impedance and the velocity of a human limb (r=0·79). A change of upper-limb impedance was caused by a change in a sectional area of muscular tissue in the measured part and a change of blood volume during movement of an upper limb. In tennis, there was a strong relationship between a change of forearm impedance and ball velocity (r=0·87). Impedance waveforms were useful for analysis of the movement pattern and the stability of movement in tennis. This method has the following characteristics: (a) it does not have a spatial and temporal limitation for measurement; (b) the subject is scarcely restricted in movement; (c) the data processing can be handled easily and quickly; (d) impedance waveforms inherently show magnitude, form and stability of movement.

Original languageEnglish
Pages (from-to)465-472
Number of pages8
JournalMedical & Biological Engineering & Computing
Volume30
Issue number5
DOIs
Publication statusPublished - Sep 1992

Fingerprint

Acoustic impedance
Electric Impedance
Extremities
Angular velocity
Kinetic parameters
Forearm
Tennis
Kinematics
Blood
Tissue
Upper Extremity
Elbow Joint
Blood Volume
Biomechanical Phenomena

Keywords

  • Biodynamic analysis
  • Bioelectrical impedance
  • Sports skill

ASJC Scopus subject areas

  • Health Information Management
  • Health Informatics
  • Biomedical Engineering
  • Computer Science Applications
  • Computational Theory and Mathematics

Cite this

Fundamental characteristics of human limb electrical impedance for biodynamic analysis. / Nakamura, Takao; Yamamoto, Y.; Yamamoto, T.; Tsuji, H.

In: Medical & Biological Engineering & Computing, Vol. 30, No. 5, 09.1992, p. 465-472.

Research output: Contribution to journalArticle

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