Hi, I hope you are doing well.
✔️Simple Option on http://c3dtools.com
You can use experimental data collected by IMU sensors as motion data and solve an inverse kinematic problem by OpenSim above the 4.1 version.
By the way, if you use Xsens IMUs such as DOT in your lab, you can convert Xsens data to .sto file by c3dtools.com.

Best regards