Accelerometery vs. video-derived stroke parameters in high-level swimmers
(Beschleunigungsmessung im Vergleich zu videogestützten Schlagparametern bei Hochleistungsschwimmern)
Background: Swimming is a multifaceted sport with nuanced performance parameters that tend to vary according to the swimmer`s stroke style. The extraction and analyses of swim parameters, such as lap time (LT), stroke length (SL), stroke rate (SR) and velocity are time-consuming. This may be eased and to some extent automated by the use of cost-effective tri- axial accelerometers.
Objectives: To determine the validity of tri-axial accelerometers across all four stroke styles, and to investigate kinematic differences in stroke styles using accelerometer- based data.
Methods: Twelve elite swimmers were recruited for the study. The group consisted of five male (age: 22.2 ± 2.6 years; height: 1.84 ± 0.08 m; weight: 76.2 ± 3.6 kg) and seven female (age: 20.7 ± 2.1 years; height: 1.68 ± 0.08 cm; weight: 62.0 ± 6.3 kg) swimmers.
Results: There was a small but significant bias for accelerometery data compared to video data across most parameters and stroke styles except for stroke length and stroke count (p > 0.05). However, accelerometery-derived SR, SL and velocity can be considered practically useful based on the training requirements of coaches. Parameters derived from video analysis compared to accelerometery were highly correlated (r > 0.91) and therefore consistent regardless of the method of analysis.
Conclusion: Although slight differences were present between the video and accelerometer data, these differences were not practically meaningful.
© Copyright 2021 South African Journal of Sports Medicine. SA Medical Association. Alle Rechte vorbehalten.
Schlagworte: | Schwimmen Hochleistungssport Messverfahren Leistung Schnelligkeit Beschleunigung Technik Bewegungskoordination Video Untersuchungsmethode |
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Notationen: | Kraft-Schnellkraft-Sportarten Ausdauersportarten Naturwissenschaften und Technik |
DOI: | 10.17159/2078-516X/2021/v33i1a9483 |
Veröffentlicht in: | South African Journal of Sports Medicine |
Veröffentlicht: |
2021
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Jahrgang: | 33 |
Heft: | 1 |
Seiten: | 1-6 |
Dokumentenarten: | Artikel |
Sprache: | Englisch |
Level: | hoch |