Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units
This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Running agility is required for many sports...
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| Format: | Article |
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Public Library of Science
2018
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| Online Access: | http://hdl.handle.net/1721.1/114776 https://orcid.org/0000-0002-0119-1617 |
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| author | Zaferiou, Antonia M. Ojeda, Lauro Cain, Stephen M. Vitali, Rachel V. Davidson, Steven P. Perkins, Noel C. Stirling, Leia A. |
| author2 | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics |
| author_facet | Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Zaferiou, Antonia M. Ojeda, Lauro Cain, Stephen M. Vitali, Rachel V. Davidson, Steven P. Perkins, Noel C. Stirling, Leia A. |
| author_sort | Zaferiou, Antonia M. |
| collection | MIT |
| description | This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Running agility is required for many sports and other physical tasks that demand rapid changes in body direction. Quantifying agility skill remains a challenge because measuring rapid changes of direction and quantifying agility skill from those measurements are difficult to do in ways that replicate real task/game play situations. The objectives of this study were to define and to measure agility performance for a (five-cone) agility drill used within a military obstacle course using data harvested from two foot-mounted inertial measurement units (IMUs). Thirty-two recreational athletes ran an agility drill while wearing two IMUs secured to the tops of their athletic shoes. The recorded acceleration and angular rates yield estimates of the trajectories, velocities and accelerations of both feet as well as an estimate of the horizontal velocity of the body mass center. Four agility performance metrics were proposed and studied including: 1) agility drill time, 2) horizontal body speed, 3) foot trajectory turning radius, and 4) tangential body acceleration. Additionally, the average horizontal ground reaction during each footfall was estimated. We hypothesized that shorter agility drill performance time would be observed with small turning radii and large tangential acceleration ranges and body speeds. Kruskal-Wallis and mean rank post-hoc statistical analyses revealed that shorter agility drill performance times were observed with smaller turning radii and larger tangential acceleration ranges an d body speeds, as hypothesized. Moreover, measurements revealed the strategies that distinguish high versus low performers. Relative to low performers, high performers used sharper turns, larger changes in body speed (larger tangential acceleration ranges), and shorter duration footfalls that generated larger horizontal ground reactions during the turn phases. Overall, this study advances the use of foot-mounted IMUs to quantify agility performance in contextually-relevant settings (e.g., field of play, training facilities, obstacle courses, etc.). |
| first_indexed | 2024-09-23T08:01:07Z |
| format | Article |
| id | mit-1721.1/114776 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T08:01:07Z |
| publishDate | 2018 |
| publisher | Public Library of Science |
| record_format | dspace |
| spelling | mit-1721.1/1147762022-09-30T01:43:43Z Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units Zaferiou, Antonia M. Ojeda, Lauro Cain, Stephen M. Vitali, Rachel V. Davidson, Steven P. Perkins, Noel C. Stirling, Leia A. Massachusetts Institute of Technology. Department of Aeronautics and Astronautics Stirling, Leia A. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Running agility is required for many sports and other physical tasks that demand rapid changes in body direction. Quantifying agility skill remains a challenge because measuring rapid changes of direction and quantifying agility skill from those measurements are difficult to do in ways that replicate real task/game play situations. The objectives of this study were to define and to measure agility performance for a (five-cone) agility drill used within a military obstacle course using data harvested from two foot-mounted inertial measurement units (IMUs). Thirty-two recreational athletes ran an agility drill while wearing two IMUs secured to the tops of their athletic shoes. The recorded acceleration and angular rates yield estimates of the trajectories, velocities and accelerations of both feet as well as an estimate of the horizontal velocity of the body mass center. Four agility performance metrics were proposed and studied including: 1) agility drill time, 2) horizontal body speed, 3) foot trajectory turning radius, and 4) tangential body acceleration. Additionally, the average horizontal ground reaction during each footfall was estimated. We hypothesized that shorter agility drill performance time would be observed with small turning radii and large tangential acceleration ranges and body speeds. Kruskal-Wallis and mean rank post-hoc statistical analyses revealed that shorter agility drill performance times were observed with smaller turning radii and larger tangential acceleration ranges an d body speeds, as hypothesized. Moreover, measurements revealed the strategies that distinguish high versus low performers. Relative to low performers, high performers used sharper turns, larger changes in body speed (larger tangential acceleration ranges), and shorter duration footfalls that generated larger horizontal ground reactions during the turn phases. Overall, this study advances the use of foot-mounted IMUs to quantify agility performance in contextually-relevant settings (e.g., field of play, training facilities, obstacle courses, etc.). 2018-04-18T15:03:46Z 2018-04-18T15:03:46Z 2017-11 2017-06 2018-04-11T17:08:48Z Article http://purl.org/eprint/type/JournalArticle 1932-6203 http://hdl.handle.net/1721.1/114776 Zaferiou, Antonia M. et al. “Quantifying Performance on an Outdoor Agility Drill Using Foot-Mounted Inertial Measurement Units.” edited by Yih-Kuen Jan. PLOS ONE 12, 11 (November 2017): e0188184 © 2017 Zaferiou et al. https://orcid.org/0000-0002-0119-1617 http://dx.doi.org/10.1371/journal.pone.0188184 PLOS ONE Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/ application/pdf Public Library of Science PLoS |
| spellingShingle | Zaferiou, Antonia M. Ojeda, Lauro Cain, Stephen M. Vitali, Rachel V. Davidson, Steven P. Perkins, Noel C. Stirling, Leia A. Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title | Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title_full | Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title_fullStr | Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title_full_unstemmed | Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title_short | Quantifying performance on an outdoor agility drill using foot-mounted inertial measurement units |
| title_sort | quantifying performance on an outdoor agility drill using foot mounted inertial measurement units |
| url | http://hdl.handle.net/1721.1/114776 https://orcid.org/0000-0002-0119-1617 |
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