Concurrent validity of accelerations measured using tri-axial inertial measurement unit while walking on firm, compliant and uneven surfaces
Journal article
Cole, Michael H., van den Hoorn, Wolbert, Kavanagh, Justin K., Morrison, Steven, Hodges, Paul W., Smeathers, James E. and Kerr, Graham K.. (2014). Concurrent validity of accelerations measured using tri-axial inertial measurement unit while walking on firm, compliant and uneven surfaces. PLoS ONE. 9(5), pp. 1 - 12. https://doi.org/10.1371/journal.pone.0098395
Authors | Cole, Michael H., van den Hoorn, Wolbert, Kavanagh, Justin K., Morrison, Steven, Hodges, Paul W., Smeathers, James E. and Kerr, Graham K. |
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Abstract | Although accelerometers are extensively used for assessing gait, limited research has evaluated the concurrent validity of these devices on less predictable walking surfaces or the comparability of different methods used for gravitational acceleration compensation. This study evaluated the concurrent validity of trunk accelerations derived from a tri-axial inertial measurement unit while walking on firm, compliant and uneven surfaces and contrasted two methods used to remove gravitational accelerations; i) subtraction of the best linear fit from the data (detrending); and ii) use of orientation information (quaternions) from the inertial measurement unit. Twelve older and twelve younger adults walked at their preferred speed along firm, compliant and uneven walkways. Accelerations were evaluated for the thoracic spine (T12) using a tri-axial inertial measurement unit and an eleven-camera Vicon system. The findings demonstrated excellent agreement between accelerations derived from the inertial measurement unit and motion analysis system, including while walking on uneven surfaces that better approximate a real-world setting (all differences < 0.16 m.s<sup>−2</sup>). Detrending produced slightly better agreement between the inertial measurement unit and Vicon system on firm surfaces (delta range: −0.05 to 0.06 vs. 0.00 to 0.14 m.s<sup>−2</sup>), whereas the quaternion method performed better when walking on compliant and uneven walkways (delta range: −0.16 to −0.02 vs. −0.07 to 0.07 m.s<sup>−2</sup>). The technique used to compensate for gravitational accelerations requires consideration in future research, particularly when walking on compliant and uneven surfaces. These findings demonstrate trunk accelerations can be accurately measured using a wireless inertial measurement unit and are appropriate for research that evaluates healthy populations in complex environments. |
Year | 2014 |
Journal | PLoS ONE |
Journal citation | 9 (5), pp. 1 - 12 |
Publisher | Public Library of Science |
ISSN | 1932-6203 |
Digital Object Identifier (DOI) | https://doi.org/10.1371/journal.pone.0098395 |
Scopus EID | 2-s2.0-84901386244 |
Web address (URL) | http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098395 |
Open access | Open access |
Page range | 1 - 12 |
Research Group | Sports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre |
Publisher's version | License |
Place of publication | United States of America |
https://acuresearchbank.acu.edu.au/item/8v390/concurrent-validity-of-accelerations-measured-using-tri-axial-inertial-measurement-unit-while-walking-on-firm-compliant-and-uneven-surfaces
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Publisher's version
OA_Cole_2014_Concurrent_validity_of_accelerations_measured_using.pdf | |
License: CC BY 4.0 |
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