Reliability and validity of GPS-embedded accelerometers for the measurement of badminton specific player load

Authors: Wylde, M., Lee, M., Chee Yong, L. and Callaway, A.

http://eprints.bournemouth.ac.uk/31582/

Journal: Journal of Trainology

Volume: 7

Issue: 2

Pages: 34-37

Objectives: The aim of this study was twofold, firstly to assess the reliability of the VX Sport Log GPS-based accelerometer, and secondly the validity of the same device compared to a Catapult Optieye S5 (considered a gold standard) recording at 100 Hz.

Design & Methods: A total of 15 participants were recruited to take part in two separate trials of a Badminton specific endurance test. Reliability and validity assessments were conducted using coefficients of variation, intra-class correlation coefficient, Bland-Altman plots per axis (Vertical, Antero-posterior and Medio-lateral) and for vector magnitude (player load).

Results: Reliability results demonstrate high levels of agreement between devices. Validity results also demonstrate high levels of agreement. However, there were issues with sample rate agreement between manufacturers of 0.25%.

Conclusion: This study re-emphasises the need for sports utilising GPS-based accelerometers to conduct reliability and validity studies to ensure the consistency between data collection systems

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