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:
|1||R.Knee.Lat||On the Lateral Epicondyle|
|2||R.Knee.Med||On the Medial Epicondyle|
|3||R.Ankle.Lat||On the Lateral Malleolus|
|4||R.Ankle.Med||On the Medial Malleolus|
|5||R.Calcaneus.Sup||On the center of the superior aspect of the calcaneus|
|6||R.Calcaneus.Inf||On the center of the inferior aspect of the calcaneus|
|7||R.Calcaneus.Lat||On the lateral anterior calcaneus at the same height as R.Calcaneus.Inf|
|8||R.Toe||Over the base of the great toe|
|9||R.Fifth||Over the base of the fifth toe|
|10||L.Knee.Lat||On the Lateral Epicondyle|
|11||L.Knee.Med||On the Medial Epicondyle|
|12||L.Ankle.Lat||On the Lateral Malleolus|
|13||L.Ankle.Med||On the Medial Malleolus|
|14||L.Calcaneus.Sup||On the center of the superior aspect of the calcaneus|
|15||L.Calcaneus.Inf||On the center of the inferior aspect of the calcaneus|
|16||L.Calcaneus.Lat||On the lateral anterior calcaneus at the same height as R.Calcaneus.Inf|
|17||L.Toe||Over the base of the great toe|
|18||R.Fifth||Over 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.
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:
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.
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.