Coordinate Reference System

A single reference point within the lab is established and all measurements, usually in millimeters, are recorded based on the distance from this point.

Additionally, the orientation of X, Y, and Z axes within three-dimensional lab space is also selected in the data collection computer software.

Using the "right-hand rule", the lab axes are typically oriented so Negative-Y lays parallel and in the direction of the subject's path of motion, Positive-X points perpendicular and to the left of the path of motion, and Positive-Z points vertically upward.

Each force platform also has its own reference point. The position of each platform within the lab is determined by calculating the position of each of these reference points relative to the center reference point of the lab's Coordinate Reference System.