Related Experiment Video
Updated: Jun 18, 2026
Quantified Assessment of Infant's Gross Motor Abilities Using a Multisensor Wearable
Published on: May 17, 2024
Constraints on early movement: tykes, togs, and technology
Anniek A T K Groenen1, Anne J A Kruijsen, Genna M Mulvey
1Faculty of Human Movement Sciences, Vrije University, The Netherlands.
Insights
Diapers alone do not significantly impact infant stepping patterns. However, adding research equipment or extra clothing to diapers can reduce the quantity and quality of infant leg movements.
Area of Science:
- Developmental motor control
- Infant biomechanics
Background:
- External constraints like diapers can influence infant motor development research.
- Understanding these effects is crucial for data collection and therapeutic interventions.
Purpose of the Study:
- To investigate the impact of diapers and additional constraints on infant stepping.
- To assess how different conditions affect the quantity and quality of infant leg movements.
Main Methods:
- 12 healthy infants (2-4 months) participated.
- Four conditions were tested: no diaper, swim diaper, disposable diaper, and diaper with equipment.
- Stepping quantity and quality were recorded using video analysis.
Main Results:
- Infants showed similar stepping quantity and quality with no diaper, swim diaper, or disposable diaper.
- The 'All' condition (diaper plus equipment) significantly decreased stepping quantity and quality.
- Diapers alone did not substantially alter stepping patterns.
Conclusions:
- Disposable and swim diapers do not significantly impede infant stepping.
- Additional weight or clothing beyond a diaper can negatively affect infant movement frequency and quality.
- Findings inform best practices for infant research and therapeutic interventions.
Abstract:
Examining the effects of diapers and other external constraints on infants' leg movements may affect how we collect motor control research data, dress infants to allow optimal movement in the home, and administer therapeutic interventions for infants with motor impairments. To address this issue we supported 12 healthy infants (2-4 months) on an infant-sized treadmill in each of four conditions: wearing nothing (None), a swim diaper (Swim), a disposable diaper (Diaper), or a combination of diaper and research recording equipment (All). We recorded the trials with a digital video camera and behavior coded number of steps and step type (alternating, parallel, double, or single steps) to assess both quantity and quality of movements. Infants produced similar numbers of steps in a predominantly alternating step pattern (high quality) during the None, Swim and Diaper conditions, but both quantity and quality of stepping decreased in the All condition. Our results suggest that diapers alone do not alter stepping patterns significantly, but sufficient additional weight and clothing beyond the diaper can affect movement frequency and quality in young infants.
