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Stephane Bouilland
06-15-1994, 03:11 AM
Dear subscribers,

The "jerk" or body segments acceleration's derivative is sometimes used as a
comfort criteria.I would like to know why, and what is it's physical meaning? I
also would like to know if there are normative studies about this comfort
criteria (i.e. : When does the jerk become uncomfortable?).
I also wonder if differentiation technics (using quintic spline for example) of
motion analysis systems data are sufficiently reliable to access the jerk which
means the third numeric derivative of position data.

Thanks in advance to those who will answer me, I will sum up the responses.

Stephane Bouilland
Universite de Valenciennes
France
E-mail : bouilland@univ-valenciennes.fr