RRA on multiple gait trials of same subject

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Kevin Tanghe
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RRA on multiple gait trials of same subject

Post by Kevin Tanghe » Mon Dec 17, 2018 12:35 pm

Hi,

I have experimentally measured kinematics and ground reaction forces of several gait trials of the same subject. I would like to use the RRA tool to adjust the mass(center) of the different bodies in order to get the residuals on the pelvis as small as possible.

However, it does not make sense to obtain a different skeletal model for each trial. Is there a way to obtain one optimized model for all trials?

Regards,
Kevin
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Thomas Uchida
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Re: RRA on multiple gait trials of same subject

Post by Thomas Uchida » Mon Dec 17, 2018 1:40 pm

You may wish to follow Chris Dembia's approach, as described in the Methods > Simulations of experiments section of Dembia, C.L., Silder, A., Uchida, T.K., Hicks, J.L., Delp, S.L. Simulating ideal assistive devices to reduce the metabolic cost of walking with heavy loads. PLoS ONE, 12(7), 2017. http://nmbl.stanford.edu/wp-content/upl ... l-2017.pdf
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Kevin Tanghe
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Re: RRA on multiple gait trials of same subject

Post by Kevin Tanghe » Tue Dec 18, 2018 5:25 am

Thank you for the answer. For the interested reader: in the suggested paper an adjusted model was made for each trial separately. Then a final model was made by averaging the mass properties of the bodies of the different models.

Any other suggestions?
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