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As a practitioner, three-dimensional (3D) motion capture might not be your day-to-day go to analysis tool for a range of reasons, including:

  • equipment and resourcing limitations,
  • technical expertise/proficiency requirements,
  • extensive and labour-intensive collection and processing time,
  • variation in capture methods and modelling protocols,
  • need to adapt techniques and customise marker sets and models for specific sports and environments.

Despite these challenges, 3D motion capture is considered the accuracy “gold standard” for 3D movement and technique analysis with optical retroreflective motion capture considered the most accurate marker-based system for representing and modelling the human body during static and dynamic motion (Merriaux et al., 2017). At the system level, Vicon, in an in-house whitepaper, showed their cameras to have a maximum error of 0.035 mm in static trials and 0.397mm in dynamic trials (Vicon 2021).  Independent testing of Vicon’s positioning performance has also shown mean absolute errors of 0.15 mm in static experiments and < 2 mm error in dynamic experiments (Merriaux et al., 2017) giving practitioners further confidence in the accuracy of marker-based retro-reflective systems.

However, it is the obstacles that plague 3D motion capture assessment protocols which has motivated the design of these resources so that you, the practitioner, can undertake a motion capture session, even to analyse the most difficult of techniques with confidence and some guiding principles. You will find in these resources a streamlined guide and hub for all things you need to complete a motion capture collection using standard UWA protocols, or your own custom implementation of it.

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