INTRODUCTION. There are a lot
of techniques which allow postural oscillation analysis, observed on a
subject in orthostatic position, among those, the pressure centre
analysis is considered to be a relevant method. The pressure centre can
be considered as a nervous system controlled variable, proportionally
with the force moment applied with both feet on a standing surface,
representing the muscular force necessary for high structure
establishment. Pressure center time analysis, can reveal informations
about the control postural system. Some authors realised the division
of the variables tided of pressure center in 2 categories: global and
structural parameters. Global parameters (medium speed) gives a general
balance performance representation on a time medium higher than 20
seconds. Structure parameters inform about control processes. Control
in proaction which is the main stabilization mechanism process, a
sequence of motric anticipation command.
MATERIAL AND METHOD.
In this study were tested 2 teams: one formed from ANEFS students,
second formed from performance shooting sport’s
practicant’s. The test was made with a new postural test
software program, which allowes the visualisation of foot pression
indicate the body weight center, and the amprents of standing foot.
Each subject was tested in standing position 30 seconds. So in the
floor surface plan can be established conventionally 2 directions: N-S
for anterior-posterior center projection movements, and E-V for
laterality. Those movements will register oscillation proportionally
with the pressure center instability.
CONCLUSION. The results show a semnificativ difference between the N-S
oscillation for the 2 groups. A possible answer can be that usually the
lack of equilibrum has place in the automatic postural answers, speed
below 250 msec, which excludes any voluntary control component.
WORDS: pressure center, postural oscillation, postural test