Measurement of frog semitendinosus force, tendon load-deformation and load-strain properties

Richard L. Lieber*, Margot E. Leonard

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We previously modelled the relationship between semitendinosus (ST) sarcomere length and hip and knee joint angle during hopping assuming zero tendon compliance. In order to investigate the effect of tendon compliance we measured the load-deformation and load-strain properties of the frog ST tendon using a dual-mode motor and video dimensional analyzer. Maximum tetanic tension (Po) for these samples averaged 0.3 ± 0.05 N; tendon strain at Po would be less than 2%. These data suggest that, during an isometric contraction at optimal sarcomere length, the muscle fiber shortens from 2.2 μm to 2.0 μm with tendon slack at 2.2 μm. In this particular case, muscle force would not be altered. However, in other cases tendon compliance could effect ST force.

Original languageEnglish (US)
Number of pages1
JournalJournal of Biomechanics
Issue number10
StatePublished - Jan 1 1989
EventAbstracts of the XII Congress, International Society of Biomechanics - Los Angeles, CA, USA
Duration: Jun 26 1989Jun 30 1989

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation


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