A GNSS-based method to define athlete manoeuvrability in field-based team sports

Journal article


Duthie, Grant Malcolm, Robertson, Sam and Thornton, Heidi Rose. (2021). A GNSS-based method to define athlete manoeuvrability in field-based team sports. PLoS ONE. 16(11), p. e0260363. https://doi.org/10.1371/journal.pone.0260363
AuthorsDuthie, Grant Malcolm, Robertson, Sam and Thornton, Heidi Rose
Abstract

This study presented a method of quantifying the manoeuvrability of two field-based team sport athletes and investigated its relationship with running velocity during competition. Across a season, 10 Hz Global navigation satellite system (GNSS) devices were worn during matches by 62 athletes (Australian Football League [AFL]; n = 36, 17 matches, National Rugby League [NRL]; n = 26, 21 matches). To quantify manoeuvrability, tortuosity was calculated from the X and Y coordinates from match GNSS files (converted from latitude and longitude). Tortuosity was calculated as 100 x natural logarithm of the chord distance (distance travelled between X and Y coordinates), divided by the straight-line distance. The maximal tortuosity was then quantified for each 0.5 m∙s-1 speed increment, ranging from 0 to the highest value for each game file. A quadratic model was fitted for each match file, controlling for the curvilinear relationship between tortuosity and velocity. A comparison of the quadratic coefficients between sports, and within sport between positions was investigated using linear mixed models. Resulting standard deviations (SDs) and mean differences were then assessed to establish standardized effect sizes (ES) and 90% confidence intervals (CI). A curvilinear relationship exists between maximal tortuosity and running speed, reflecting that as speed increases, athletes’ ability to deviate from a linear path is compromised (i.e., run in a more linear path). Compared to AFL, NRL had a greater negative quadratic coefficient (a) (ES = 0.70; 0.47 to 0.93) for the 5 second analysis, meaning that as speed increased, NRL athletes’ manoeuvrability reduced at a faster rate than when compared to AFL. There were no positional differences within each sport. GNSS derived information can be used to provide a measure of manoeuvrability tortuosity during NRL and AFL matches. The curvilinear relationship between tortuosity and speed demonstrated that as speed increased, manoeuvrability was compromised.

Year2021
JournalPLoS ONE
Journal citation16 (11), p. e0260363
PublisherPublic Library of Science
ISSN1932-6203
Digital Object Identifier (DOI)https://doi.org/10.1371/journal.pone.0260363
PubMed ID34797902
Scopus EID2-s2.0-85119994205
PubMed Central IDPMC8604331
Open accessPublished as ‘gold’ (paid) open access
Page range1-14
Publisher's version
License
File Access Level
Open
Output statusPublished
Publication dates
Online19 Nov 2021
Publication process dates
Accepted08 Nov 2021
Deposited28 Nov 2022
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