title: Diurnal variation in gait characteristics and transition speed.
abstract: The aim of this study was to investigate the effect of time-of-day on Preferred Transition Speed (PTS) and spatiotemporal organization of walking and running movements. Twelve active male subjects participated in the study (age: 27.2 ± 4.9 years; height: 177.9 ± 5.4 cm; body mass: 75.9 ± 5.86 kg). First, PTS was determined at 08:00 h and 18:00 h. The mean of the two PTS recorded at the two times-of-day tested was used as a reference (PTSm). Then, subjects were asked to walk and run on a treadmill at three imposed speeds (PTSm, PTSm + 0.3 m.s(-1), and PTSm - 0.3 m.s(-1)) at 08:00 h and 18:00 h. Mean stride length, temporal stride, spatial stride variability, and temporal stride variability were used for gait analysis. The PTS observed at 08:00 h (2.10 ± 0.17 m.s(-1)) tends to be lower (p = 0.077) than that recorded at 18:00 h (2.14 ± 0.19 m.s(-1)). Stride lengths recorded while walking (p = 0.038) and running (p = 0.041) were shorter at 08:00 h than 18:00 h. No time-of-day effect was observed for stride frequency during walking and running trials. When walking, spatial stride variability (p = 0.020) and temporal stride variability (p = 0.028) were lower at 08:00 h than at 18:00 h. When running, no diurnal variation of spatial stride variability or temporal stride variability was detected.
authors.affiliation: Normandie University , Caen , France .
authors.forename: Nicolas
authors.initials: N
authors.lastname: Bessot
authors.forename: Romain
authors.initials: R
authors.lastname: Lericollais
authors.forename: Antoine
authors.initials: A
authors.lastname: Gauthier
authors.forename: Bruno
authors.initials: B
authors.lastname: Sesboüé
authors.forename: Jan
authors.initials: J
authors.lastname: Bulla
authors.forename: Sebastien
authors.initials: S
authors.lastname: Moussay
mesh_terms: D000328:Adult; D002940:Circadian Rhythm; D005684:Gait; D006801:Humans; D008297:Male; D012420:Running; D013997:Time Factors; D016138:Walking; D055815:Young Adult
keywords: Chronobiology; gait analysis; preferred transition speed; running; walking