Age-related changes in arm motion during typical gait.

Area of Science:

• Biomechanics
• Developmental Motor Control
• Human Gait Analysis

Background:

• Toddlers initially walk with a high guard arm position.
• Reciprocal arm swing develops as gait matures in childhood.
• Limited research exists on arm movement changes after early childhood development.

Purpose of the Study:

• To investigate age-related changes in arm movement patterns during typical gait.
• To analyze the maturation of arm swing from childhood through adulthood.

Main Methods:

• Gait analysis using a full-body marker set (Plug-in Gait) on 102 participants.
• Participants categorized into five age groups: young children (3-5.9y), children (6-9.9y), pubertal children (10-13.9y), adolescents (14-18.9y), and adults (19-35.2y).
• Comparison of continuous joint angular waveforms, mean joint angles, and range of motion between age groups.

Main Results:

• Overall arm movement patterns were similar across age groups, but consistency increased with age.
• Younger children (G1-G2) exhibited greater mean shoulder extension and elbow flexion compared to older groups.
• Adults showed a significantly larger range of shoulder axial rotation than all other age groups.

Conclusions:

• Arm swing maturation is a gradual process, not reaching adult-like parameters uniformly across all joints.
• Adult-like arm swing parameters are generally not achieved before ages 10-14 years.