Dear all,
I have some gait lab data which contain position of lower body markers.
If I calculate Sacrum markers acceleration, could I assume this acceleration as linear acceleration that an inertial sensor measures?
is there any references?
When accelerometers are firmly attached on the body and not on top of highly active muscles or soft tissues that move during motion, they provide excellent results which are highly comparable to those from optical tracking systems. An accelerometer and a passive marker placed on the same landmark would return very close measurements.
This, is well reported in the literature for treadmill running (Lindsay et al., 2016) and other activities (Heyn et al., 1996; Mayagoitia et al., 2002; Thies et al., 2007).
References:
doi: 10.1109/IEMBS.1996.651817
doi: 10.1080/14763141.2015.1123760
doi: https://doi.org/10.1016/S0021-9290(01)00231-7
doi: https://doi.org/10.1016/j.medengphy.2006.10.012
Sokratis Dimitrios Komaris
your comment was really helpful... so, second derivation of a marker position could be an standard acceleration of a point. an accurate accelerometer could measure it so I can use marker position instead of accelerometer data.
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