Arch index and running biomechanics in children aged 10-14 years

NewsBot · Jan 18, 2018

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Arch index and running biomechanics in children aged 10-14 years
Karsten Hollander' et al
Gait and Posture; Article in Press

Highlights
•Only few associations between foot arch and running biomechanics in children.
•A low foot arch was associated with an increased foot progression angle.
•No association between foot arch and sagittal plane joint kinematics at ground contact.
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Background
While altered foot arch characteristics (high or low) are frequently assumed to influence lower limb biomechanics and are suspected to be a contributing factor for injuries, the association between arch characteristics and lower limb running biomechanics in children is unclear.

Research question
Therefore, the aim of this study was to investigate the relationship between a dynamically measured arch index and running biomechanics in healthy children.

Methods
One hundred and one children aged 10-14 years were included in this study and underwent a biomechanical investigation. Plantar distribution (Novel, Emed) was used to determine the dynamic arch index and 3D motion capture (Vicon) to measure running biomechanics. Linear mixed models were used to determine the association between dynamic arch index and foot strike patterns, running kinematics, kinetics and temporal-spatial outcomes.

Results
No association was found between dynamic arch index and rate of rearfoot strikes (p = 0.072). Of all secondary outcomes, only the foot progression angle was associated with the dynamic arch index (p = 0.032) with greater external rotation in lower arched children.

Significance
Overall, we found only few associations between arch characteristics and running biomechanics in children. However, altered foot arch characteristics are of clinical interest. Future studies should focus on detailed foot biomechanics and include clinically diagnosed high and low arched children.
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