Measurement of one-leg standing for qualification test of rhythmic stepping exercise using laser range sensor

Ayanori Yorozu, Toshiki Moriguchi, Hirofumi Namikawa, Masaki Takahashi

Research output: Contribution to conferencePaper

Abstract

Falling is a common problem in the growing elderly population and fall risk assessment tools are needed for community-based fall prevention program. To improve motor and cognitive function simultaneously, rhythmic stepping exercise (RSE) has been proposed and we have developed a measurement system using a laser range sensor (LRS). However, there is to be danger of falls during the RSE depending on the motor function of the participant. Therefore, it is necessary to determine whether the participant is able to perform the RSE or not based on the evaluation of motor function. A one-leg standing test can evaluate the motor function of the participant in a short period of time. The aim of this study is to propose a method of measurement the one-leg standing for the qualification test of the RSE using an LRS. In the RSE measurement system, the LRS installed at the shin height to obtain the trajectory of both legs during the RSE. However, it is difficult to measure a start (foot-off) and end (foot-contact) time of one-leg standing from the two-dimensional distance data obtained by the LRS directly. To solve the problem, we propose a method to detect the behavior of foot-off and foot-contact based on not only the position and speed but also the width of the raising leg which are obtainable in the two-dimensional data. From the experimental results with elderly people, it was confirmed that the proposed method could measure the foot-off and foot-contact time in one-leg standing.

Original languageEnglish
Publication statusPublished - 2014 Jan 1
Event12th International Conference on Motion and Vibration Control, MOVIC 2014 - Sapporo, Hokkaido, Japan
Duration: 2014 Aug 32014 Aug 7

Other

Other12th International Conference on Motion and Vibration Control, MOVIC 2014
CountryJapan
CitySapporo, Hokkaido
Period14/8/314/8/7

Keywords

  • Fall
  • Laser range sensor
  • Measurement system
  • One-leg standing test
  • Stepping performance

ASJC Scopus subject areas

  • Control and Systems Engineering

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  • Cite this

    Yorozu, A., Moriguchi, T., Namikawa, H., & Takahashi, M. (2014). Measurement of one-leg standing for qualification test of rhythmic stepping exercise using laser range sensor. Paper presented at 12th International Conference on Motion and Vibration Control, MOVIC 2014, Sapporo, Hokkaido, Japan.