The Motion Analysis Corp. treadmill running analysis application creates measurements of the critical lower extremity biomechanical parameters while running on a treadmill. It supplies a complete kinematic report of the legs as well as measurements about the player's technique. Data can be used to compare the biomechanics among players, or show comparisons of the same player over time. This guide will step through the procedures to properly acquire the running trials and then operate RunTrak.
What you need
A Motion Analysis Corp. Motion Capture system.
29 Retroreflective Markers and configured as shown below:
Marker #14, the right Thigh, should be 1/3 the distance between the R. ASIS and R. Knee. Marker #16, the right Shank, should be 1/3 the distance between the R. Knee and R. Ankle. Marker #20, the Left Thigh, should be 2/3 the distance between the L. ASIS and L. Knee. Marker #22, the Left Shank, should be 2/3 the distance between the L. Knee and L. Ankle.
Data Collection Setup
Data collection for RunTrak is similar to most MAC collections. 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, RunTrak requires some specific collection procedures to ensure correct calculations. Trial Collection describes the recommended workflow to collect your trials.
Running the RunTrak Application
Now that the trials are collected, data are clean and events selected, you can use the RunTrak Application to perform the calculations and generate the reports.
Click to watch the Video Tutorial on how to use the RunTrak Application:
To run RunTrak, Click Applications>RunTrak
Complete the Subject Information fields for the runner:
Now Select the Trials that you want to process with RunTrak, 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.
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de Leva, P. (1996). Adjustments to Zatsiorsky-Seluyanov's segment inertia parameters. Journal of Biomechanics, 29(9): p. 1223-1230.
Kadaba, M. P., Ramakrishnan, H. K., & Wootten, M. E. (1990). Measurement of lower extremity kinematics during level walking. Journal of Orthopaedic Research, 8(3), 383-392.
Novacheck, T. (1998). Review paper: The biomechanics of running. Gait and Posture, 7, 77-95.
Winter, D. (2005). Biomechanics of Motor Control and Human Movement. 3rd ed. Hoboken, NJ: John Wiley and Sons, Inc.