Abstract
An advanced physical training machine for the elderly is proposed. This machine has a self-tuning loading-level function based on the muscular condition of the user. The loading force is generated by an electric motor. A controller calculates the proper loading force for the user at every moment based on the user's muscle activity level. Muscle activity is measured by a muscle stiffness sensor, which was developed as a man–machine interface in a wearable device to assist a disabled person's body motions. By using this sensor, a reliable measurement of muscle activity is available, and the easy installation does not disturb the user's body motions. An experimental training machine was prototyped, and its excellent abilities in both controlling the loading force and measuring the muscle activity throughout the periods of the training is demonstrated. The experimental results are reported in this article.
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