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A l’initiative du Groupement
d’Isocinétisme Belge et Luxembourgeois 6ème Journée Belge
d’ISOCINETISME Vendredi 14 et samedi 15 mars
2008 ANALYSE DE LA MARCHE A PARTIR
D’UN ACCELEROMETRE TRIAXIAL : D. MAQUET, D. CHAPELIER, A.
BOUQUEGNEAU, J.M. CRIELAARD, J.L. CROISIER Département des Sciences de la
Motricité, Université de Liège Email :
D.Maquet@ulg.ac.be Background
and aims Walking is one of the most
universal of all human activities and the primary exercise recommended by
public health authorities. Gait analysis represents a relevant method to detect
walking disorders and to appreciate the effectiveness of treatments. The
purpose of this study was to develop an original walking test likely to show
abnormal gait. This test could be relevant particularly in patients with
pathologies associated to symptoms of physical or mental fatigue and
psychomotor slowdown. Methods Gait analysis data of 265 healthy
volunteers (144 women and 121 men aged 5-83 years), included in nine age
groups, were established. The subjects walked at their comfortable speed down
and back along a 40 meters straight corridor. Subjects repeated the way three
times corresponding to a total distance of 240 meters. Gait analysis system
included two accelerometers (Locometrix®). A 20-second period of stabilized
walking was selected for each of the 6 ways to calculate stride frequency,
stride length, stride regularity, step symmetry and medio-lateral,
cranio-caudal and antero-posterior activities. The walking speed was measured
with electrical photocells. Results Good reproducibility
(intraexaminator, inter-corridor and inter-analysis) was observed for the majority of parameters. Normative data
and patterns during the 6 ways were established for all variables, age groups
and sex. Speed began to decrease during the sixth decade in men and the seventh
decade in women. Conclusion Patterns of parameters measured
during an original walking test offer relevant perspectives to gait analysis
and to track the evolution of gait after treatments in several pathologies. Evolution of stride length in
men 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 Way 1
Way 2 Way 3 Way 4 Way 5 Way 6 Stride
length (meters) aged 5-9 y. aged 10-14 y. aged 15-19 y. aged 20-29 y. aged 30-39 y. aged 40-49 y. aged 50-59 y. aged 60-69 y. aged 70-83 y. |