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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 )
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Journal of NeuroEngineering and Rehabilitation

ISSN: 1743-0003

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