Optimization of backpack loads using gait parameters in school boys.

Area of Science:

• Biomechanics
• Pediatric Health
• Ergonomics

Background:

• Backpacks are essential for students, but heavy loads can cause cumulative trauma.
• Gait parameters are sensitive to load-induced biomechanical changes.
• Understanding optimal backpack weight is crucial for preventing long-term musculoskeletal issues.

Purpose of the Study:

• To determine the most favorable backpack weight for schoolchildren.
• To use gait analysis as an indicator of biomechanical impact.
• To identify a safe backpack load threshold for children.

Main Methods:

• Observational study on 20 typically developing boys (9-14 years).
• Gait analysis using video capture and motion analysis software (Kinovea).
• Systematic increase in backpack load relative to body weight.

Main Results:

• Significant kinematic changes observed in ankle, knee, and hip joints with increased backpack load.
• These gait alterations became apparent when backpack weight exceeded 15% of body weight.
• Children's dynamic posture is affected by backpack loads beyond this threshold.

Conclusions:

• The optimal backpack weight for children should be less than 15% of their body weight.
• This weight limit helps maintain dynamic posture and prevent potential gait adaptations.
• Recommendations for safe backpack use in children are supported by these findings.