Sagittal standing posture and relationships with anthropometrics and body composition during childhood

•Postural heterogeneity between genders denotes different biomechanical loads.•Lumbar and sway angles are the best proxies for overall posture in children.•Postural patterns are more readily interpretable than isolated angular parameters. Anthropometry and body composition are plausible influences on pediatric sagittal standing posture. Despite that, the relationship of anthropometrics since birth and body composition with individual postural parameters in children has never been assessed. To assess the associations between anthropometrics since birth and body composition parameters, and angles of sagittal standing posture in children. The sample included 1021 girls and 1096 boys, evaluated in the population-based birth cohort Generation XXI, Portugal. Weight and height were obtained at birth, 4 and 7 years of age. At age 7, total body less head fat/fat-free mass and bone properties were estimated from whole body dual energy X-ray absorptiometry scans and posture was assessed through right-side photographs during habitual standing with retro-reflective markers placed on body landmarks. Girls showed increased values of lumbar angle, head and neck flexion, and craniocervical angle with the largest mean (standard deviation) difference in lumbar angle [281.7° (7.4) vs. 276.8° (7.1) in boys, p