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Physical Activity Device Reliability and Validity during Pregnancy and Postpartum.

Michelle R Conway1, Mallory R Marshall1, Rebecca A Schlaff1

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

Medicine and Science in Sports and Exercise
|October 28, 2017
PubMed
Summary
This summary is machine-generated.

Physical activity (PA) devices demonstrate moderate to strong reliability and moderate validity for tracking women's activity during pregnancy and postpartum. These findings support their use in research and clinical settings.

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Area of Science:

  • Obstetrics and Gynecology
  • Sports Medicine
  • Biomedical Engineering

Background:

  • Current physical activity (PA) guidelines for pregnancy are based on known health benefits for mother and child.
  • Few studies have assessed the accuracy of PA monitoring devices during pregnancy due to physiological changes.
  • Reliability and validity of hip, ankle, and triceps worn devices during pregnancy are not well-established.

Purpose of the Study:

  • To determine the reliability and validity of PA devices worn on the hip, ankle, and triceps.
  • To assess these devices during pregnancy and the postpartum period.

Main Methods:

  • Thirty-three women underwent testing at ~21 and 32 weeks of pregnancy and 12 weeks postpartum.
  • Participants performed daily activities and a treadmill walk during two visits per period, 1 week apart.
  • Indirect calorimetry measured energy expenditure, while accelerometers/pedometers at hip, ankle, and triceps quantified PA. Reliability and validity were assessed using intraclass correlation coefficients (ICC) and Pearson correlations against indirect calorimetry.

Main Results:

  • Device reliability was moderate to strong, with 66% of Pearson correlations between 0.6-1.0.
  • Multitrial ICC values were predominantly moderate to strong (38% between 0.6-0.79; 50% between 0.8-1.0).
  • Validity coefficients comparing devices to indirect calorimetry showed 40% between 0.4-0.59 and 46% between 0.6-0.79.

Conclusions:

  • Physical activity monitoring devices exhibit moderate to strong reliability during pregnancy and postpartum.
  • The validity of these devices for measuring PA in this population is moderate.
  • Findings suggest these devices can be used with consideration of their moderate validity during pregnancy and postpartum.