Skip to main content

Advertisement

Table 2 Fit metrics for the ground reaction kinetic estimation

From: Estimation of ground reaction forces and ankle moment with multiple, low-cost sensors

  F ap F v F ml
Walking 1.0 m/s RMSE (% BW) NRMSE (%) RMSE (% BW) NRMSE (%) RMSE (% BW) NRMSE (%)
Single-Task, Intra-Day 2.13 6.21 3.33 2.93 1.00 5.82
Single-Task, Inter-Day 4.40 13.07 13.06 11.48 1.85 10.97
Multi-Task, Intra-Day 2.39 6.95 4.72 4.15 1.16 6.79
  C O P ap C O P ml T v
Walking 1.0 m/s RMSE (% L) NRMSE (%) RMSE (% L) NRMSE (%) RMSE (% BWL) NRMSE (%)
Single-Task, Intra-Day 2.72 5.90 0.80 7.15 0.15 9.67
Single-Task, Inter-Day 5.25 10.89 1.21 12.54 0.30 20.08
Multi-Task, Intra-Day 2.76 6.21 0.85 6.77 0.18 11.25
  F ap F v F ml
Walking 1.5 m/s (% BW) RMSE (%) NRMSE (% BW) RMSE (%) NRMSE (% BW) RMSE (%) NRMSE
Single-Task, Intra-Day 2.34 4.38 4.43 3.47 1.36 5.41
Single-Task, Inter-Day 6.19 11.76 14.59 11.36 2.61 10.24
Multi-Task, Intra-Day 2.53 4.74 5.37 4.19 1.44 5.69
  C O P ap C O P ml T v
Walking 1.5 m/s (% L) RMSE (%) NRMSE (% L) RMSE (%) NRMSE (% BWL) RMSE (%) NRMSE
Single-Task, Intra-Day 3.14 5.25 0.79 6.60 0.20 9.35
Single-Task, Inter-Day 6.10 10.57 1.37 12.84 0.34 16.50
Multi-Task, Intra-Day 3.55 5.46 0.84 6.80 0.22 10.56
  F ap F v F ml
Calf Raise RMSE (% BW) NRMSE (%) RMSE (% BW) NRMSE (%) RMSE (% BW) NRMSE (%)
Single-Task, Intra-Day 0.77 16.97 3.41 15.89 0.68 16.08
Single-Task, Inter-Day 1.39 32.46 7.58 39.63 1.45 34.92
Multi-Task, Intra-Day 1.57 37.22 5.33 24.98 0.91 22.48
  C O P ap C O P ml T v
Calf Raise RMSE (% L) NRMSE (%) RMSE (% L) NRMSE (%) RMSE (% BWL) NRMSE (%)
Single-Task, Intra-Day 1.11 5.83 0.35 9.86 0.13 20.70
Single-Task, Inter-Day 3.78 20.29 0.89 28.06 0.25 44.59
Multi-Task, Intra-Day 1.78 9.19 0.49 14.32 0.13 21.74
  1. Root mean squared (RMSE) and Normalized root mean squared error (NRMSE) for the six ground reaction force components of the walking at 1.5 m/s trial, and three select of the ground reaction kinetics of the calf raise task. The multi-task, intra-day model performs as well as the single-task, intra-day model which means that with sufficient training data, the insole can be used to study multiple locomotion tasks. Component Names: Anterior-Posterior Force (F ap ), Vertical Force (F v ), Medial-Lateral Force (F ml ), Anterior-Posterior Center of Pressure (C O P ap ), Medial-Lateral Center of Pressure (C O P ml ), Vertical Torque (T v )