Instrumented treadmill

Instrumented treadmill analysis is not intended for clinical interpretation and should be used for research purposes only.

It is possible to use the module with instrumented treadmills. The following points must be considered:

Set the event mode in the session details to "Instrumented treadmill (...)", depending on the type of treadmill you are using. 'manual' mode expects LHS/RHS/LTO/RTO events to be set manually in QTM, 'automatic' mode is using Zeni (2008) algorithm and 'using template file' mode asks for a measurement in which events are labeled manually.
Enter the correct treadmill speed in the trial details in QTM.
Visual3D automatically assigns the force to the left/right foot depending on which foot is in contact with the treadmill. The force vector will appear blue in Visual3D to indicate that it has been assigned to a body segment.
Both feet must be on separate belts of the force plates at all times. If both feet make contact with the same belt at some point, the file needs to be cropped to exclude these sections.
For single belt treadmill double support phase is excluded from the analysis.
Note: Using Treadmetrix single force plate instrumented treadmill for walking will result in empty COP graphs.

Arsalis (Gaitway-3D) treadmill

When h/p/cosmos treadmill with Gaitway-3D integration is used, single force is automatically decomposed into two forces. It is required that treadmill is connected to the computer for decomposition to happen.
Event mode can be set to either "Instrumented treadmill (split belt)" or "Instrumented treadmill (single belt").
For the algorithm to work it is necessary to export analog signals to TSV files. To do so, open your project in QTM, go to > Project Options > Processing >TSV Export and on Data Type check Analog check box. Also check checkboxes for General settings as indicated in the picture.

Note: If the Gaitway treadmill is controlled from another PC, you need to install the Gaitway software on the Qualisys PC as well (i.e. on the PC where you run the Visual3D processing). The Qualisys PC needs to have network access to the Gaitway treadmill to be able to run the Gaitway Force Splitting algorithm.

Note: Decomposition algorithm has only been validated for level walking/running.