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. 2022 Apr 27;22(9):3338. doi: 10.3390/s22093338

Figure 7.

Figure 7

Subject−averaged (N = 18) ground reaction forces (GRFs), model predictions, and model errors for running downhill and level ground at 3.4 m/s for a single subject. The left two columns represent a generic model that was trained on the other 17 subjects in the study. The right two columns represent a subject−specific model that is trained on 17 subjects plus ≈10% of the data from the subject illustrated. The top row shows the average vertical GRF from the force platform (FP) along with average recurrent neural network (RNN) predictions. Areas shaded green are where there were significant differences between the FP and RNN (p < 0.05). The second row shows the mean absolute percent error plus/minus one standard deviation for the RNNs in the vertical direction. The third row shows average anterior/posterior (A/P) GRF from the FP and average RNN predictions. Areas shaded green are where there were significant differences between the FP and RNN (p < 0.05). The bottom row shows the mean absolute percent error plus/minus one standard deviation for the RNNs in the A/P direction.