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A comparison of low-intensity physical activity, growth, and sleep behavior in 6-month old infants

Janet L Hauck1, Gabriela R Zott2, Isabella T Felzer-Kim1

  • 1Department of Kinesiology, Michigan State University, East Lansing, MI, 48824, United States.

Infant Behavior & Development
|November 3, 2018
PubMed

Insights

Infants with less nighttime sleep spent more time in low-intensity physical activity (PA) and had higher weight-for-length z-scores. Promoting healthy infant sleep is crucial for development.

Area of Science:

  • Pediatrics
  • Developmental Biology
  • Sleep Science

Background:

  • Infant growth and development are influenced by sleep and physical activity.
  • Understanding the interplay between sleep patterns and physical activity in early infancy is critical.

Purpose of the Study:

  • To investigate the relationship between low-intensity physical activity (PA), sleep behavior, and growth in 6-month-old infants.
  • To determine if sleep duration and patterns correlate with physical activity levels and growth metrics.

Main Methods:

  • Utilized 24-hour accelerometry to objectively measure sleep behavior and physical activity in 22 infants.
  • Assessed growth using weight-for-length z-scores.
  • Employed bivariate correlations to analyze the relationships between variables.

Main Results:

  • Infants with less total sleep exhibited increased low-intensity PA (r = -0.524, p = 0.012).
  • Reduced nighttime sleep correlated with higher nap frequency (r = -0.460, p = 0.031), longer nap duration (r = -0.529, p = 0.011), and greater weight-for-length z-scores (r = -0.481, p = 0.024).
  • Infants with less nighttime sleep still accumulated less total sleep (r = 0.608, p = 0.003).

Conclusions:

  • Preliminary findings suggest a link between insufficient nighttime sleep, increased low-intensity physical activity, and altered growth parameters in infants.
  • These results underscore the importance of establishing healthy nighttime sleep behaviors in infancy for optimal development.

Keywords:
Motor developmentObesityPediatricsSedentary

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