Usability and effects on gait of an optimized schoolchildren backpack
Jansen Atier Estrázulas1, Jaisson Agne Estrázulas1, Rodrigo Ghedini Gheller2
1School of Health, Amazonas State University, Manaus, Brazil.
Background:
Backpacks used by children is a global concern, because may cause musculoskeletal discomforts and pain.
Objective:
The purpose of this study was to test the usability and effects on gait kinematics wearing the Trunkpack versus a traditional backpack and no backpack.
Methods:
Twenty-four children (9 to 11 years old) from a public school participated in this study. The usability was evaluated after a five-week testing period using a questionnaire. Gait kinematics was evaluated (Vicon) when the children were wearing a standard backpack, an optimized backpack (Trunkpack), and no backpack. Both backpacks were loaded with 10% of body weight.
Results:
Was observed more trunk, hip and knee flexion when the children carried a standard backpack in comparison using the Trunkpack and not carrying a backpack (p < 0.01). The Trunkpack and no backpack were similar. The Trunkpack was well accepted by the schoolchildren (81% positive responses), 79% liked the head opening, 88% liked the waist straps, and 83% liked the facility to put and take objects in and out of the Trunkpack.
Conclusion:
Trunkpack requires less postural adjustments during gait than a standard backpack. Gait kinematics with the Trunkpack was comparable to the gait without carrying a backpack.
