Recognition of daily ambulatory movements utilizing accelerometer and barometer

Yasuaki Ohtaki, Hikaru Inooka, Akihiro Suzuki, Koichi Sagawa, Zhan Xiumin, Mitsuharu Okutsu, Ryoichi Nagatomi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

Main objective of this study is to evaluate physical activity by means of a portable device that estimates the type of physical activity and the exercise intensity. A simple and effective algorithm was proposed to classify physical activities including vertical movements, such as stair climbing or use of elevator. A portable measurement device with accelerometers and a barometer was specially designed to detect the features of vertical movements. Walking speed was calculated by an equation which estimates the walking speed as a function of signal energy of vertical body acceleration during walking. Healthy young subjects participated in our experimental study. The portable device was attached to the waist. To confirm the feasibility of the method, oxygen uptake was also measured by a portable expiratory gas analyzer. Experimental results showed that the proposed method classified all type of ambulatory defined in the algorithm successfully. Resultant energy consumption estimated by the proposed method was found to be similar to the measured values of the expiratory gas analyzer. It was suggested that the consideration of vertical movements made a improvement in the estimation of energy consumptions, and the proposed method provides better estimation of physical activity.

Original languageEnglish
Title of host publicationProceedings of the Second IASTED International Conference on Biomechanics
EditorsM.H. Hamza
Pages18-21
Number of pages4
Publication statusPublished - 2004
Externally publishedYes
EventProceedings of the Second IASTED International Conference on Biomechanics - Honolulu, HI, United States
Duration: 2004 Aug 232004 Aug 25

Publication series

NameProceedings of the Second IASTED International Conference on Biomechanics

Other

OtherProceedings of the Second IASTED International Conference on Biomechanics
CountryUnited States
CityHonolulu, HI
Period04/8/2304/8/25

Keywords

  • Energy expenditure
  • Ergonomics systems
  • Human walking
  • Physical activity
  • Portable instruments
  • Quality of life

ASJC Scopus subject areas

  • Engineering(all)

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