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Data fusion algorithm performance. The mean RMSE between the IMU‐ and MOCAP‐based trunk angles across the three trunk angles across all included anatomical trunk motion trials is displayed on the vertical axis. The β value used as input for the data fusion algorithm to compute the IMU‐based trunk orientation is displayed at the horizontal axis. The vertical line represents the β value (β = 0.034) at the mean RMSE minimum (mean RMSE = 3.49 ± 1.14º)
