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Related Experiment Video

Updated: May 29, 2026

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity
05:59

Visualization of Intensity Levels to Reduce the Gap Between Self-Reported and Directly Measured Physical Activity

Published on: March 7, 2019

Adverse Pregnancy Outcomes and Sedentary Behavior, Light-Intensity Physical Activity, and Daily Steps.

Bethany Barone Gibbs1, Jaemyung Kim2, Jacob Gallagher3

  • 1West Virginia University, Morgantown.

JAMA
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

Reducing sedentary behavior and increasing light-intensity physical activity (LPA) and daily steps during pregnancy are linked to fewer adverse outcomes. This highlights the importance of lighter activities for maternal and infant health.

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Area of Science:

  • Obstetrics and Gynecology
  • Public Health
  • Preventive Medicine

Background:

  • Moderate- to vigorous-intensity physical activity is recommended for reducing adverse pregnancy outcomes.
  • Associations between lower-intensity activities and adverse pregnancy outcomes are not well-established.

Purpose of the Study:

  • To determine the associations between adverse pregnancy outcomes and sedentary behavior (SED), light-intensity physical activity (LPA), and daily steps during pregnancy.

Main Methods:

  • A cohort study involving 470 pregnant volunteers assessed SED, LPA, and daily steps using accelerometers across trimesters.
  • Participants were grouped by activity patterns (SED duration, LPA type, daily steps).
  • Multivariable logistic regression models estimated risks of adverse pregnancy outcomes (hypertensive disorders, gestational diabetes, preterm birth, small for gestational age infants).

Main Results:

  • Higher sedentary behavior (SED) was associated with more than double the risk of adverse pregnancy outcomes.
  • Higher light-intensity physical activity (LPA) was associated with half the risk of adverse pregnancy outcomes.
  • Increased daily steps were associated with fewer adverse pregnancy outcomes, including hypertensive disorders of pregnancy.

Conclusions:

  • Reducing sedentary time and increasing light-intensity physical activity and daily steps are associated with significantly lower risks of adverse pregnancy outcomes.
  • Optimizing lighter-intensity activity patterns may be a viable strategy to improve pregnancy health and should be rigorously tested.