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Accuracy of single beam timing lights for determining velocities in a flying 20-m sprint: Does timing light height matter?

Altmann, Stefan 1; Spielmann, Max 1; Engel, Florian Azad; Ringhof, Steffen 1; Oriwol, Doris 1; Härtel, Sascha; Neumann, Rainer 1
1 Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Background: The purpose of this study was to evaluate the accuracy of timing lights (TL) at different heights for measuring velocities during sprinting. Methods: Two sets of single beam TL were used to determine velocities reached in a flying 20-m sprint in 15 healthy and physically active male participants. In TL64, all TL were set up at a height of 64 cm, and in TL100, all TL were set up at 100 cm, respectively. Participants performed three valid trials. The recordings of high-speed video cameras were used as a reference. Results: ICC and Pearson’s r values between both timing light heights and the reference system were almost perfect (0.969–0.991). Bland & Altman’s LOA (95 %) indicated low systematic and unsystematic errors, with somewhat smaller LOA for TL100 (-0.013–0.121 m/s) than for TL64 (-0.060–0.120 m/s). Measures of between-trial reliability of running velocities showed a high relative (ICC) and absolute (RMSE) reliability, with the reference system showing slightly better values in all reliability measures (ICC=0.935; RMSE<0.001 m/s) compared to TL64 and TL100 (ICC=0.894, 0.887; RMSE=0.107 m/s, 0.124 m/s, respectively). ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000085668
Veröffentlicht am 04.09.2018
DOI: 10.14198/jhse.2018.133.10
Zitationen: 1
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2018
Sprache Englisch
Identifikator ISSN: 1988-5202
KITopen-ID: 1000085668
Erschienen in Journal of human sport and exercise
Verlag Facultad de Educación
Band 13
Heft 3
Seiten 601-610
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Schlagwörter Sprint performance, Timing gates, Validity, High-speed video analysis, Photocells
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