Validation of an inertial measurement unit for the measurement of jump count and height

Autor: Willem H. Meeuwisse, Roald Bahr, Kerry MacDonald, Jackie L. Whittaker, Jennifer Baltich
Rok vydání: 2017
Předmět:
Zdroj: Physical Therapy in Sport. 25:15-19
ISSN: 1466-853X
DOI: 10.1016/j.ptsp.2016.12.001
Popis: Objectives To validate the use of an inertial measurement unit (IMU) for the collection of total jump count and assess the validity of an IMU for the measurement of jump height against 3-D motion analysis. Design Cross sectional validation study. Setting 3D motion-capture laboratory and field based settings. Participants Thirteen elite adolescent volleyball players. Independent variables Participants performed structured drills, played a 4 set volleyball match and performed twelve counter movement jumps. Main outcome measures Jump counts from structured drills and match play were validated against visual count from recorded video. Jump height during the counter movement jumps was validated against concurrent 3-D motion-capture data. Results The IMU device captured more total jumps (1032) than visual inspection (977) during match play. During structured practice, device jump count sensitivity was strong (96.8%) while specificity was perfect (100%). The IMU underestimated jump height compared to 3D motion-capture with mean differences for maximal and submaximal jumps of 2.5 cm (95%CI: 1.3 to 3.8) and 4.1 cm (3.1–5.1), respectively. Conclusion The IMU offers a valid measuring tool for jump count. Although the IMU underestimates maximal and submaximal jump height, our findings demonstrate its practical utility for field-based measurement of jump load.
Databáze: OpenAIRE
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