This study aimed to characterize the five functional domains (pace, variability, rhythm, asymmetry, and postural control) of gait performance in 3-10-year-old children. Methods: A total of 76 healthy children aged 3-10 years and 14 young adults were included in this study. The child population was divided into four age groups: 3-4, 5-6, 7-8, and 9-10 years. Participants were instructed to walk at self-selected speed barefoot on a 6-m walkway. Spatiotemporal gait parameters (step length (SL),

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... p velocity (SV), step time (ST), stance time (STT), and swing time (SWGT)) were calculated using a 10-camera VICON 3D motion analysis system. In addition, mean values, standard deviation, coeffi cient variation (CV), and symmetry index (SI) were calculated. These gait parameters were divided into fi ve domains: pace (SL, SV, and SWGT̲CV), variability (SL̲CV, SV̲CV, ST̲CV, and STT̲CV), rhythm (ST, STT, and SWGT), asymmetry (ST̲SI, STT̲SI, and SWGT̲SI), and postural control (SW, SW̲CV, and SL̲SI). Results: Differences in spatiotemporal parameters as regards a gait pattern were not significant in children aged 7-10 years and in adults (pace, rhythm, and asymmetry domains), whereas group diff erences in variability and postural control domains were signifi cant in all children and adult groups. Conclusion: Development of each of the five functional domains with respect to gait performance varies, and gait variability and stability mature longer than the gait pattern.