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Ground Reaction Forces in Children's Gait
Nancy L Greer1, Joseph Hamill2, Kevin R Campbell3
1School of Physical Education and Recreation, 110 Cooke Hall, University of Minnesota, Minneapolis, MN 55455, USA.
Insights
Young children (3-4 years) exhibit distinct walking ground reaction forces compared to adults, with sex-based differences emerging early. Boys show greater vertical forces and mediolateral excursions than girls.
Area of Science:
- Pediatrics
- Biomechanics
- Human Movement Science
Background:
- Understanding pediatric gait development is crucial for identifying atypical movement patterns.
- Ground reaction forces (GRFs) provide key insights into the biomechanics of walking.
Purpose of the Study:
- To analyze and compare GRF patterns in 3- and 4-year-old children with adult data.
- To investigate sex-based differences in pediatric GRF during barefoot walking.
Main Methods:
- Observed GRF patterns in 18 children (3-4 years old) walking barefoot.
- Evaluated vertical, anteroposterior, and mediolateral force components at self-selected pace.
- Compared pediatric data to established adult biomechanical norms.
Main Results:
- Children exhibited higher relative vertical forces, lower minimum vertical forces, earlier braking-to-propulsion transitions, and greater mediolateral excursions than adults.
- Boys demonstrated greater vertical peak force differences, lower minimum forces, increased braking forces, and higher mediolateral excursions compared to girls.
Conclusions:
- Children aged 3-4 years display unique GRF patterns distinct from adults.
- Significant sex-based differences in GRF parameters are observable in young children.
Abstract:
Ground reaction force patterns during walking were observed in 18 children 3 and 4 years of age. The children walked barefoot at a self-chosen walking pace. Selected variables representing the vertical, anteroposterior, and mediolateral force components were evaluated. The results indicated that children in this age range contact the ground with greater vertical force measures relative to body mass than do adults. In addition, the minimum vertical force was lower, the transition from braking to propulsion occurred earlier, and the mediolateral force excursions were higher than typically found in adults. When the children were divided into groups on the basis of sex, differences were observed between those groups. The boys exhibited a greater difference in the vertical peak forces, a lower minimum force, a greater braking force, and a higher mediolateral force excursion value. The results indicated that children display a different ground reaction force pattern than do adults and that differences between boys and girls may be observed as early as ages 3 and 4 years.
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