title: Data set of healthy old people assessed for three walking conditions using accelerometric and opto-electronic methods.
abstract: BACKGROUND
  Gait patterns of healthy aging are needed to allow a comparison with pathological situations. However, little data is available.
  
  
  OBJECTIVE
  To present gait pattern of healthy older specially selected to be "healthy walkers".
  
  
  METHODS
  Fifty-seven older people benefited from a geriatric assessment including clinical and functional evaluations to include only those without gait disorders. Gait data were simultaneously recorded using a tri-axial accelerometer placed on the waist and four 3D position markers placed on the feet at the level of the heel and the toe. Volunteers walked at comfortable self-selected speed (CW), fast self-selected speed (FW), and finally in dual task walking condition (DTW). The extracted gait parameters were: gait speed, stride length, stride frequency, regularity and symmetry, swing, stance and double support time and ratio and minimum toe clearance. Gait speed and stride length were normalized to the right leg length.
  
  
  RESULTS
  Fifty-seven older people with a mean age of 69.7 ± 4.2 years old (range from 65 to 82 years) were included. Data were analyzed according to the gender and according to the age (<70 or ≥70 years old). After normalization to leg length, the main significant differences were shown for stride length and minimum toe clearance in CW, FW and in DTW that were shorter in women. The regularity in FW was significantly lower among older volunteers.
  
  
  CONCLUSIONS
  This work provides a data set considering 14 gait parameters obtained from 57 healthy old people strictly selected and assessed for three walking conditions and shows that GS, SL and MTC have to be related to the gender. The age-related impact on gait performances appears reduced in this cohort.
authors.affiliation: Geriatric Department, University Hospital of Liège, C.H.U. site NDB, Route de Gaillarmont, 600, 4032, Chênée, Belgium. sgillain@chu.ulg.ac.be.
authors.forename: S
authors.initials: S
authors.lastname: Gillain
authors.affiliation: INTELSIG Laboratory, Department of Electrical Engineering and Computer Science, University of Liège, Liege, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Boutaayamou
authors.affiliation: Public Health Department, University of Liège, Liege, Belgium.
authors.forename: N
authors.initials: N
authors.lastname: Dardenne
authors.affiliation: Laboratory of Human Motion Analysis, LAMH, University of Liège, Liege, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Schwartz
authors.affiliation: Science of Motricity Department, University of Liège, Liege, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Demonceau
authors.affiliation: Geriatric Department, University Hospital of Liège, C.H.U. site NDB, Route de Gaillarmont, 600, 4032, Chênée, Belgium.
authors.forename: C
authors.initials: C
authors.lastname: Gerontitis
authors.affiliation: Neurology Department, University Hospital of Liège, Chênée, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Depierreux
authors.affiliation: Neurology Department, University Hospital of Liège, Chênée, Belgium.
authors.forename: E
authors.initials: E
authors.lastname: Salmon
authors.affiliation: Neurology Department, University Hospital of Liège, Chênée, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Garraux
authors.affiliation: Research Unit in Public Health, Epidemiology and Health Economics, University of Liège, Liege, Belgium.
authors.forename: O
authors.initials: O
authors.lastname: Bruyère
authors.affiliation: Laboratory of Human Motion Analysis, LAMH, University of Liège, Liege, Belgium.
authors.forename: O
authors.initials: O
authors.lastname: Brüls
authors.affiliation: Laboratory of Human Motion Analysis, LAMH, University of Liège, Liege, Belgium.
authors.forename: J-L
authors.initials: JL
authors.lastname: Croisier
authors.affiliation: Geriatric Department, University Hospital of Liège, C.H.U. site NDB, Route de Gaillarmont, 600, 4032, Chênée, Belgium.
authors.forename: J
authors.initials: J
authors.lastname: Petermans
mesh_terms: D061725:Accelerometry / Q000379:methods; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D005260:Female; D005528:Foot / Q000502:physiology; D005684:Gait / Q000502:physiology*; D015577:Geriatric Assessment / Q000379:methods*; D006304:Health Status; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007866:Leg / Q000502:physiology; D008297:Male; D011446:Prospective Studies; D012016:Reference Values; D012737:Sex Factors
keywords: Accelerometers; Comfortable; Dual task; Fast; Gait; Kinematics; Reference values