Design and Development of Lower Limb Chair Exercise Support System with Depth Sensor


  • Toshiya Watanabe Ibaraki University
  • Susumu Shibusawa Ibaraki University
  • Masaru Kamada Ibaraki University
  • Tatsuhiro Yonekura Ibaraki University
  • Naohiro Ohtsuka East Japan Institute of Technology Co., Ltd;



chair exercise, lower limb, elderly population, depth sensor, exercise system design, preventative care


Sustaining lower limb functionality is extremely important in the preventative care of the elderly. Chair exercise, in which the exerciser sits on an ordinary chair, offers a way for seniors with little physical strength to exercise without a great deal of effort. Meanwhile, Microsoft's Kinect sensor that is capable of detecting human motion without the subject having to wear any kind of a special marker are becoming widely available. Exploiting this new sensor technology, this paper describes the design and development of a prototype lower limb chair exercise support system. The system supports five different chair exercises designed to strengthen the lower limbs, recognizes and evaluates exercises based on 3D position data and joint angles for each joint obtained from the Kinect sensor. The system illustrates how to do the exercises by voice instructions and model images, and superimposes the muscles used onto an image of the exerciser in real time. The system also provides exercise assessment results and advice by voice and text. In a series of trials involving seven elderly subjects in their late 70s and early 80s, an overall average recognition rate of 89% was obtained for the five exercises. Feedback was obtained through a questionnaire given to subjects ranging in age from 50 to 65, which highlighted a number of issues that should be addressed to improve the effectiveness of the system.

Author Biographies

Toshiya Watanabe, Ibaraki University

2010 B.Eng., Ibaraki University

2012 M.Eng., Ibaraki University

PhD Candidate, Graduate School of Science and Engineering, Ibaraki University

Susumu Shibusawa, Ibaraki University

Professor, School of Engineering, Ibaraki University

Masaru Kamada, Ibaraki University

Professor, School of Engineering, Ibaraki University

Tatsuhiro Yonekura, Ibaraki University

 Professor, School of Engineering, Ibaraki University



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How to Cite

Watanabe, T., Shibusawa, S., Kamada, M., Yonekura, T., & Ohtsuka, N. (2015). Design and Development of Lower Limb Chair Exercise Support System with Depth Sensor. Discoveries in Agriculture and Food Sciences, 3(4), 30.