Motor differences in jumping among children with and without autism spectrum disorder

Area of Science:

• Developmental Pediatrics
• Movement Science
• Autism Spectrum Disorder Research

Background:

• Motor impairments are common in autism spectrum disorder (ASD), yet complex motor skills like jumping remain understudied.
• This research investigates differences in jumping performance and lower-limb biomechanics between children with ASD and typically developing (TD) peers.

Purpose of the Study:

• To compare the jump performance (distance, height) of children with ASD and TD children.
• To analyze and compare lower-limb kinematics (hip, knee, ankle movement) during the jumping phases in both groups.

Main Methods:

• Ten children with ASD (3-6 years) and ten age-matched TD children participated.
• Two-legged jumps were performed in a biomechanics lab, measuring jump distance, height, and joint kinematics.
• One-way multivariate analysis of covariance (ANCOVA) was used for group comparisons, with age as a covariate.

Main Results:

• Children with ASD exhibited significantly shorter jump distances compared to TD peers (p=0.043).
• The ASD group showed significantly reduced hip flexion during both preparatory (p=0.019) and loading (p=0.050) phases.
• Reduced peak knee flexion was observed in the ASD group during the loading phase (p=0.034), while jump height and ankle kinematics did not differ significantly.

Conclusions:

• Children with ASD display altered jumping mechanics, including shorter jumps and restricted lower-limb flexion, suggesting specific coordination challenges.
• These findings emphasize the need to assess and address motor skill deficits in ASD to promote physical activity and participation.