Introduction

When evaluating motion capture systems, researchers often express concerns about having the flexibility needed to define subject models exactly as required for their study. Common questions include:

• • Which marker sets are supported?
  • What methods are available to determine joint centers?
  • Can segment axes be defined in any orientation?

Since our beginning 30 years ago we have continuously enhanced every aspect of the setup process to offer users maximum flexibility and precision.  Today, our platform allows you to:

• • Customize Marker Sets: Reproduce any published set, design your own, or use rigid body clusters. Or eliminate markers altogether using digital video with AI engines from Theia, SouthWest Research Institute, or KinaTrax.
  • Define Joint Centers Flexibly: Specify joint centers as offsets from markers or landmarks, use our digitizer to pinpoint landmarks, or apply established methods such as the functional, Bell, or Davis approaches.
  • Automatically Generate Segment Axes: Create axes following ISB standards, Grood-Suntay definitions, anatomical guidelines, or any user-defined configuration.
  • Select Appropriate Anthropometrics: Base your analysis on data from Zatsiorsky, Demptster, or targeted population studies.
  • Integrate Muscle Modeling: Seamlessly add muscle models using any published framework such as  OpenSim or create your own model from scratch.

The process for creating your subject definition is fast, flexible, and highly accurate—as demonstrated in this brief 2‑minute video: