3D body centre of mass trajectory in locomotion: comparison between different measurements methods

TL;DRAbstract

Introduction and Objectives: Body centre of mass (BCoM) trajectory is largely used to describe human and animal locomotion with the final aim to estimate the mechanical work performed by muscles. The BCoM can be calculated through 2 different methods: i) by double integration of ground reaction forces (GRF) and ii) by the weighted mean of the local centres of mass of the body anatomical segments, which are collected through an optoelectronic system. Although both methods are currently exploited, the use of the GRF is considered the gold standard as it provides a (relative) BCoM trajectory as caused by both hard and soft tissue motion. However, it allows capturing only a limited number of strides and repeated trials are requested for reliable results. Kinematic measurements, conversely, can be carried out while moving on a treadmill, so that an adequate strides number and speed could be collected. Several biomechanical models are available to analyse the kinetics of human body and the u

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