mitkof6 wrote:Could you post the figures?

Of course, below I posted the figure. Where x (blue) and z (yellow) euler angles appear to alternate.

http://imgur.com/a/giIEK

Body kinematics reports the local frame (position and orientation) of each body as measured in the ground frame. Thanks for your reply. And yes that is what it should give me indeed. However, if I look at the Euler angles of the pelvis they vary hugely, whereas looking in the GUI the pelvis is more...

I was planning to do a comparison between IMUs and optical systems for measuring of segment orientations. However, I am struggling a bit to get proper segment orientations from the OpenSim GUI. Here is what I have done so far: Analyze-> BodyKinematics: Which give me segment orientations in x-y-z eul...