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Effects of infant care posture and weight on static postural balance
Ji-Won Kim1,2, Sang-Ho Cha1, Min-Kyun Lee1
1Department of Biomedical Engineering, Konkuk University, Chungju, Korea.
Insights
Carrying infants on the back, especially heavier ones, significantly impacts postural balance more than holding them. This research highlights risks associated with infant care postures.
Area of Science:
- Biomechanics
- Human Movement Science
- Ergonomics
Background:
- Postural balance during infant care is understudied.
- Infant care activities can pose risks for musculoskeletal issues and falls.
Purpose of the Study:
- To quantify static postural balance in different infant care postures.
- To assess the influence of infant dummy weight on postural stability.
Main Methods:
- Sixteen healthy adults stood on a force platform in holding and back-carrying postures.
- Infant dummies weighing 4.6 kg and 9.8 kg were used.
- Center of Pressure (COP) data analyzed using two-way repeated measure ANOVA.
Main Results:
- Back carrying, particularly with a 12-month dummy, showed greater COP amplitude, distance, peak power, velocity, and area.
- Significant effects of infant weight were observed, primarily in the anterior-posterior direction.
- Back carrying posture significantly reduced postural stability compared to holding.
Conclusions:
- Findings suggest increased fall risk and potential for musculoskeletal disorders in back-carrying postures.
- Results can inform the design of assistive devices to enhance postural balance during infant care.
Background:
Studies investigating postural balance during various infant care postures have not been reported yet.
Objective:
The aim of this study was to measure static postural balance when holding an infant dummy in-arms and carrying an infant dummy on back according to different infant dummy weights.
Methods:
Sixteen healthy young subjects participated in a balance test. Infant dummies with weights of 4.6 kg (1-month) and 9.8 kg (12-month) were used in this study. All subjects were asked to naturally stand on a force platform in two infant care postures (holding an infant in-arms and carrying an infant on one's back). Center of pressure (COP) was measured from the force platform. Quantitative variables were derived from the COP. Two-way repeated measure analysis of variance (ANOVA) was performed to determine main effects of infant care postures, infant weight, and their interactions on COP variables.
Results:
Back carrying a 12-month infant dummy had the greatest amplitude in all COP variables. Back carrying posture showed significantly greater mean distance and peak power, faster mean velocity, and wider COP area compared to holding posture (P< 0.05). There were significant weight effects of most COP variables mainly in AP direction (P< 0.01).
Conclusions:
Our results could contribute to the prevention of musculoskeletal diseases or prevention of fall due to various infant care activities by developing an assisting device to improve postural balance.
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