FootTrak Operations Guide

The Motion Analysis Corp. foot movement analysis application creates measurements of the critical biomechanical parameters of the feet while running or walking on a treadmill. It supplies a complete rearfoot and forefoot motion assessment of both feet during a gait cycle. Data can be used to compare the biomechanics among individuals or show comparisons of the same person over time. This guide will step through the procedures to properly acquire the gait trials and then operate FootTrak.


What you need

Motion Analysis Corp. Motion Capture system. 18 Retroreflective Markers and configured as shown below:

Foottrak Marker Set
MARKERCOMMENTS
1R.Knee.LatOn the Lateral Epicondyle
2R.Knee.MedOn the Medial Epicondyle
3R.Ankle.LatOn the Lateral Malleolus
4R.Ankle.MedOn the Medial Malleolus
5R.Calcaneus.SupOn the center of the superior aspect of the calcaneus
6R.Calcaneus.InfOn the center of the inferior aspect of the calcaneus
7R.Calcaneus.LatOn the lateral anterior calcaneus at the same height as R.Calcaneus.Inf
8R.ToeOver the base of the great toe
9R.FifthOver the base of the fifth toe
10L.Knee.LatOn the Lateral Epicondyle
11L.Knee.MedOn the Medial Epicondyle
12L.Ankle.LatOn the Lateral Malleolus
13L.Ankle.MedOn the Medial Malleolus
14L.Calcaneus.SupOn the center of the superior aspect of the calcaneus
15L.Calcaneus.InfOn the center of the inferior aspect of the calcaneus
16L.Calcaneus.LatOn the lateral anterior calcaneus at the same height as R.Calcaneus.Inf
17L.ToeOver the base of the great toe
18R.FifthOver the base of the fifth toe

Data Collection Setup

Data collection for FootTrak is similar as with any collection. There are some settings for calibration and data collection that you should use that will help ease the process. Learn about the recommended data collection settings in Data Collection Setup.

Trial Collection

You should already be familiar with how to collect 3D data using Cortex. However, FootTrak requires some specific collection procedures to ensure correct calculations. Trial Collection describes the recommended workflow to collect your trials.

Running the FootTrak Application

Now that the trials are collected, data are clean and events selected, you can use the FootTrak Application to perform the calculations and generate the reports. Click to watch the Video Tutorial on how to use the FootTrak Application:

To run FootTrak, Click Applications>FootTrak Complete the Subject Information fields for the jumper: Now Select the Trials that you want to process with FootTrak, and click on the Generate Reports button. The Kinematics graphs will be populated for the last selected trial. Check that the graphs are filled and do not have errors. If you want, you can print out these reports by right clicking in the presentation graphs pane and selecting File>Print Graph Image. Open the MS Excel program and select the trial that you want to view. The Excel workbook will have three tabs. A listing of the data will be on the first tab, with the Graphs and WebReport on the other tabs. Here is an example report in Excel:

Foottrak Dark Report

There is a table that has the gait parameters: A green check box and a red check box will indicate within or outside normative ranges.

References

Dillon, M., Hansen, A. H., & Fatone, S. (2008). Influence of marker models on ankle kinematics in persons with partial foot amputation: An investigation using a mechanical model. The Journal of Rehabilitation Research and Development, 45(4), 567-576.

Nawoczenski, D. a, & Ludewig, P. M. (2004). The effect of forefoot and arch posting orthotic designs on first metatarsophalangeal joint kinematics during gait. Journal of Orthopaedic and Sports Physical Therapy, 34(6), 317-327.

Stebbins, J., Harrington, M., Thompson, N., Zavatsky, A., & Theologis, T. (2006). Repeatability of a model for measuring multi-segment foot kinematics in children. Gait and Posture, 23(4), 401-410.

Wright, C. J., Arnold, B. L., Coffey, T. G., & Pidcoe, P. E. (2011). Repeatability of the modified Oxford foot model during gait in healthy adults. Gait and Posture, 33(1), 108-112.