Measuring changes in muscle stiffness after eccentric exercise using elastography

M A Green, R Sinkus, S C Gandevia, R D Herbert, L E Bilston

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)

Abstract

Muscle stiffness has been reported to increase following eccentric muscle exercise, but to date only indirect methods have been used to measure it. This study aimed to use Magnetic Resonance Elastography (MRE), a noninvasive imaging technique, to assess the time-course of passive elasticity changes in the medial gastrocnemius and soleus muscles before and after a bout of eccentric exercise. Shear storage modulus (G') and loss modulus (G'') measurements were made in eight healthy subjects for both muscles in vivo before, one hour after, 48 hours after and 1 week after eccentric exercise. The results show a 21% increase in medial gastrocnemius storage modulus following eccentric exercise with a peak occurring ~48 hours after exercise (before exercise 1.15 ± 0.23 kPa, 48 hours after 1.38 ± 0.27 kPa). No significant changes in soleus muscle storage modulus were measured for the exercise protocol used in this study, and no significant changes in loss modulus were observed. This study provides the first direct measurements in skeletal muscle before and after eccentric exercise damage and suggests that MRE can be used to detect the time course of changes to muscle properties.
Original languageEnglish
Pages (from-to)852-858
Number of pages7
JournalNmr in Biomedicine
Volume25
Issue number6
DOIs
Publication statusPublished - Jun 2012

Keywords

  • Adult
  • Elastic Modulus
  • Elasticity Imaging Techniques
  • Female
  • Humans
  • Image Interpretation, Computer-Assisted
  • Male
  • Muscle Contraction
  • Muscle, Skeletal
  • Physical Exertion
  • Young Adult

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