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DOI: 10.5445/IR/1000085668
Veröffentlicht am 04.09.2018
DOI: 10.14198/jhse.2018.133.10

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

Altmann, Stefan; Spielmann, Max; Engel, Florian Azad; Ringhof, Steffen; Oriwol, Doris; Härtel, Sascha; Neumann, Rainer

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, respecti ... mehr

Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1988-5202
URN: urn:nbn:de:swb:90-856684
KITopen ID: 1000085668
Erschienen in Journal of human sport and exercise
Band 13
Heft 3
Seiten 1-10
Bemerkung zur Veröffentlichung Open Access, Link zum Volltext:
Schlagworte Sprint performance, Timing gates, Validity, High-speed video analysis, Photocells
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