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• W4387166321 abstract "One of the most important forces generated during gait is the vertical ground reaction force (vGRF). This force can be measured using force plates, but these can limit the scope of gait analysis. This paper presents a method to estimate the vGRF using inertial measurement units (IMU) and machine learning techniques. Four wearable IMUs were used to obtain flexion/extension angles of the hip, knee, and ankle joints, and an IMU placed over the C7 vertebra to measure vertical acceleration. We trained and compared the performance of two machine learning algorithms: feedforward neural networks (FNN) and random forest (RF). We investigated the importance of the inputs introduced into the models and analyzed in detail the contribution of lower limb kinematics and vertical acceleration to model performance. The results suggest that the inclusion of vertical acceleration increases the root mean square error in the FNN, while the RF appears to decrease it. We also analyzed the ability of the models to construct the force signal, with particular emphasis on the magnitude and timing of the vGRF peaks. Using the proposed method, we concluded that FNN and RF models can estimate the vGRF with high accuracy." @default.
• W4387166321 created "2023-09-30" @default.
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• W4387166321 date "2023-09-29" @default.
• W4387166321 modified "2023-10-18" @default.
• W4387166321 title "Estimating vertical ground reaction forces during gait from lower limb kinematics and vertical acceleration using wearable inertial sensors" @default.
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• W4387166321 doi "https://doi.org/10.3389/fbioe.2023.1199459" @default.
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