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Time range for RRA and CMC

Posted: Fri Jun 20, 2014 9:10 am

by resodad

Hello,
I see in some published work that RRA and CMC are conducted by "cycle," i.e. 100% gait cycle where the start time is right contact (or left) and the end time is the next right contact (or left).
This results in three RRA models with different COMs and masses for multiple cycles.
What is the benefit of this if you have three cycles worth of data?
Why not analyze all three cycles at once?
Regards,
John

Re: Time range for RRA and CMC

Posted: Thu Jun 26, 2014 10:33 am

by jimmy

Hi John,

Ideally, if you ran RRA on three (separate) gait trials you would get the exact same models changes (COM, mass). In reality, you don't.

In our lab, we will mean the changes (COM, mass) in 1 model that will get applied to all the data. Once you have this one model, you will have to re-run RRA with the original kinematics. This will give you the adjusted kinematics that can be input into CMC.

Hope that helps,
-james