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September 10, 2025Journal of BiomechanicsOpen Access

Concurrent validity of IMU and phone-based markerless systems for lower-limb kinematics during cognitively-challenging landing tasks

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Authors

FBFilippo BertozziPolitecnico di MilanoCBClaudia BrunettiUniversity of MilanPMPietro MaverPolitecnico di Milano

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Implication

Concurrent validity of IMU and markerless systems for lower-limb kinematics was evaluated, highlighting distinct accuracy differences.

Key Points

  • IMU and phone-based systems provide comparable kinematic waveforms for lower-limb movements, with significant variability noted.
  • Knee flexion showed low error (NRMSE ≤ 10%), but hip rotation lacked agreement, indicating system limitations.
  • Bland-Altman plots and statistical mapping revealed varying degrees of validity across different joints and planes.
  • Findings point to the potential of IMU-based systems, although full kinematic accuracy, especially in the transverse plane, remains uncertain.

Cite This Study

Bertozzi et al. (2025) studied this question.

synapsesocial.com/papers/68c1b80c54b1d3bfb60ebc54https://doi.org/10.1016/j.jbiomech.2025.112883
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