Article

The main purpose of this study was to describe and interpret the COP trajectory
during barefoot running in a large cohort of young adults with no history of
injury. COP data were collected from 215 subjects, who ran at 3.3 ms(-1) over a
16.5m long track, with a built in Footscan pressure platform. COP data were
filtered using a 50 Hz lowpass butterworth filter and normalised. Reliability was
then studied and mean curves were calculated for medial-lateral displacement
(COP(x)) and velocity (v(x)COP), anterior-posterior displacement (COP(y)) and
velocity (v(y)COP) as well as for the resultant velocity (v(xy)COP). Displacement
and velocity of the COP provided insight over functional foot behaviour. A
medially oriented peak in v(x)COP was found, which may reflect the fast initial
pronation. A laterally oriented second peak in v(x)COP, together with a second
peak in v(y)COP, indicated a fast forward shift of the COP over the lateral
border of the foot during forefoot contact phase. During the forefoot push off
phase, at the level of the metatarsals, anterior velocities of the COP were low
and reflected the importance of the forefoot during push off. Finally, the COP
course was studied for high arch, normal and low arch feet and indicated, a more
lateral COP course for the low arch feet.

Langue : ANGLAIS