Hello,
I normally use inverse kinematics and get maximum marker error of less than 4cm as per the documentation. However, I am now trying squat movements and whatever I do (including changing weights) the maximum error does not go below 6cm for some part of the movement.
Is that much error okay? Or should I do anything (what?) to reduce it even more?
Thank you
Inverse Kinematics Error
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Carmichael Ong
- Posts: 407
- Joined: Fri Feb 24, 2012 11:50 am
Re: Inverse Kinematics Error
Whether these errors are acceptable or not will depend on your exact research question. For instance, if you are using one of the typical gait models, it's possible that the torso markers may not match well if the person is bending their spine during the motion (and the torso is one rigid body and cannot match that bend).
If you want to study the spine, then the model may not be good enough for your research, and it would be good to find a model that's validated for that.
If you are more focused on the kinematics of the ankle or knee (e.g., away from the markers with large errors in this example), it might be good enough. It's important to ensure you plan what parameters to validate that make the most sense for your specific study.
If you want to study the spine, then the model may not be good enough for your research, and it would be good to find a model that's validated for that.
If you are more focused on the kinematics of the ankle or knee (e.g., away from the markers with large errors in this example), it might be good enough. It's important to ensure you plan what parameters to validate that make the most sense for your specific study.