Journal of the Japanese Physical Therapy Association
Online ISSN : 2188-8361
Print ISSN : 1344-1272
ISSN-L : 1344-1272
Physical Therapy Japan Vol.40 (2013) Abstracts
Relationship between Muscle Stiffness Measured by the Muscle Hardness Meter and Passive Torque or Myotendinous Junction Displacement
Masatoshi NAKAMURATome IKEZOEYohei TAKENONaoki OTSUKANoriaki ICHIHASHI
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2014 Volume 17 Issue 1 Pages 51

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Abstract

Purpose: The purpose of this study was to investigate the relationship between muscle stiffness (transverse stiffness) measured by muscle hardness meter and passive torque as well as myotendinous junction (MTJ) displacement (longitudinal stiffness), which are considered indexes of the muscle-tendon unit (MTU) and the muscle stretching levels. Methods: Forty-one healthy young men volunteered to participate in this study. Passive torque and MTJ displacement of the medial head of the gastrocnemius were assessed using an ultrasound machine and a dynamometer during passive ankle dorsiflexion. Simultaneously, muscle stiffness of the medial head of the gastrocnemius was measured using a muscle hardness meter (Myotonometer). Relationship between muscle stiffness and passive torque or MTJ displacement were determined using Spearman rank correlation coefficient. Results: Significant positive correlations were observed between muscle stiffness and passive torque and MTJ displacement (p < 0.01). Conclusion: These results suggest that muscle stiffness measured by muscle hardness meter may be an accurate indicator of MTU and muscle stretching levels.

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© 2014 by the Japanese Physical Therapy Association
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