• J Med Eng Technol · Sep 2007

    Development of a fibre optic goniometer system to measure lumbar and hip movement to detect activities and their lumbar postures.

    • J A Bell and M Stigant.
    • Department of Physiotherapy, Leeds Metropolitan University, Leeds, UK. j.a.bell@leedsmet.ac.uk
    • J Med Eng Technol. 2007 Sep 1; 31 (5): 361-6.

    AbstractIf sitting postures influence the risk of developing low back pain then it is important that quantification of sedentary work activities and simultaneous measurement of lumbar postural characteristics takes place. The objective of this study was to develop a system for identifying activities and their associated lumbar postures using fibre optic goniometers (FOGs). Five student subjects wore two FOGs attached to the lumbar spine and hip for 8 min while being recorded using a video camera when sitting, standing and walking. Observer Software was used to code the video recording, enabling the sagittal movement characteristics of each FOG to be described for individual activities. Results indicated that each activity produced unique data, and could be independently identified from their motion profiles by three raters (k = 1). The data will be used to develop algorithms to automate the process of activity detection. This system has the potential to measure behaviour in non-clinical settings.

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