Measurement of evoked mechanomyogram in cycling exercise

Katsuya Shinjo, Takanori Uchiyama

Research output: Contribution to journalArticlepeer-review


The purpose of this study was to develop a measurement system for evoked mechanomyogram (MMG) in cycling exercise. Ergometric cycling was performed under two workloads (60 W and 90 W) at a pedal rate of 60 rpm. When a subject extended his knee to an 80-degree angle, electric stimulus was applied to the vastus lateralis muscle every second time, and an MMG was measured with a condenser microphone. The MMG system was identified using a singular value decomposition method. The natural frequency of the system was calculated from the poles of the transfer function. In conclusion, the transfer function of evoked MMGs was well identified with a third-order model. The natural frequency increased as the workload increased. An evoked MMG in cycling exercise could be measured with the developed system.

Original languageEnglish
Pages (from-to)O-166-O-167
JournalTransactions of Japanese Society for Medical and Biological Engineering
Publication statusPublished - 2014 Aug 17


  • Cycling exercise
  • Mechanomyogram
  • System identification
  • Vastus lateralis muscle

ASJC Scopus subject areas

  • Biomedical Engineering


Dive into the research topics of 'Measurement of evoked mechanomyogram in cycling exercise'. Together they form a unique fingerprint.

Cite this