Healthy
Conditions
Keywords
subjects
Brief summary
Gait and balance disorders are important public health problem necessitating studies to try to prevent falls. Many studies have dealt with spatiotemporal gait parameters or balance during quiet standing (posturography). Nevertheless, falls occurred predominantly during gait, and rarely during quiet standing. We have developed a tool to measure balance during gait : the braking of the center of mass (CM), a biomechanical parameter obtained from the vertical velocity of the CM recorded with a force plate. In previous studies, we have shown that the braking of the CM was a physiological and a active mechanism, reflecting balance during gait. Unfortunately, the braking of the CM measured on a force plate provide an important intra-individual variability. The 3D optoelectronic gait analysis system (VICON) also provide an estimation of the CM. The primary goal of this study is to compare intra-individual variability of the braking of the CM determined by a force plate or the 3D optoelectronic gait analysis system (VICON) in healthy subjects.
Interventions
OTHERGait analysis
Subjects, barefoot and standing upright and motionless on a force plate, were instructed to walk for 10 m following a beep delivered by the experimenter. Two experimental conditions were tested: (i) the 'natural' gait condition where subjects walked normally and (ii) the 'fast' gait condition where subjects walked as fast as they could, taking large steps. Each subject performed 10 trials in each condition.
Sponsors
University Hospital, Rouen
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
20 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
* Healthy subjects * Between 20 and 40 years old * Effective contraception for women of childbearing age
Exclusion criteria
* Neurological, vestibular, rheumatologic, orthopaedic disorders, which could influence gait and balance. * Known spinal deformity * Severe visual impairment : visual acuity less than 6/10 * Inability to stand and walk without assistance 15 meters * Subjects without social security * Subjects involved in another biomedical trial during this study * Pregnant or breastfeeding women
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Braking of the center of mass index during gait initiation | 1 day | Braking of the center of mass (CM), a biomechanical parameter obtained from the vertical velocity of the CM, determined by a force plate or a 3D optoelectronic gait analysis system (VICON). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Braking of the center of mass index during locomotion | 1 day | Braking of the center of mass (CM), a biomechanical parameter obtained from the vertical velocity of the CM, determined by a 3D optoelectronic gait analysis system (VICON). |
Countries
France
Contacts
PRINCIPAL_INVESTIGATORNathalie CHASTAN, MD
University Hospital, Rouen
Outcome results
None listed