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Updated: Jul 10, 2026

Method to Measure Tone of Axial and Proximal Muscle
Published on: December 14, 2011
Relationships between muscle activity and autonomic regulation during cycling with a torque-assisted bicycle
1Graduate Sch. of Sci. & Technol., Niigata Univ., Japan. kiryu@bc.niigata-u.ac.jp
Abstract:
For customizing the assistance scheme of a torque-assisted bicycle, we estimated physical activity during cycling with ECG and surface EMG for the circuit including a steep uphill section near the middle and compared it with the vehicle data. Using the respiratory-sinus-arrhythmia-related power ratio in the fluctuation of the R-R interval, prRSA and a muscular fatigue index, we classified physical activity into four groups for each trial. Results showed that the assist enlarged prRSA but did not sufficiently support muscular fatigue.
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