IAA results - Dominance of gravity and residuals

[Rodrigo Mateus]

Hello,

I was working on an induced accelerations analysis and the results from one of the subjects was strange, since the gravity contribution+residuals contributions seem to overpower all the muscles contributions and make up for the total acceleration of the center of mass along the vertical axis, Y. I performed IK, RRA and CMC, and the results seem correct up until the IAA.

IAA.png (35.86 KiB) Viewed 203 times

Below is how the setup of the IAA was done. A RollingOnSurface constraint was used.

IAA.png (152.66 KiB) Viewed 203 times

Has anyone come across with this situation? What can be the main reasons for the muscles to be almost entirely ignored? How can I correct this?

Thank you in advance.

Rodrigo Mateus