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. 2016 Apr 22:3:353-60.
doi: 10.1016/j.pmedr.2016.04.004. eCollection 2016 Jun.

Trajectories of objectively-measured physical activity and sedentary time over the course of pregnancy in women self-identified as inactive

Jennifer L Huberty  1 , Matthew P Buman  1 , Jenn A Leiferman  2 , Jessica Bushar  3 , Marc A Adams  1
Affiliations

Trajectories of objectively-measured physical activity and sedentary time over the course of pregnancy in women self-identified as inactive

Jennifer L Huberty et al. Prev Med Rep. .

Abstract

There is a need for investigations that document the daily course of pregnancy-related changes in PA and sedentary behavior. The purpose of this study was to describe the trajectory of PA and sedentary behavior and whether they differ among weight status in pregnant women self-identified as inactive. Eighty inactive pregnant women (8-16 weeks) were recruited from a nationwide text-message intervention. PA was measured using a Fitbit. Chi-square analyses and t-tests were used to analyze univariate demographic and PA variables. Mixed model-repeated measures ANOVA was used to analyze trajectory changes in daily PA and sedentary behavior. Light activity (beta [SE] = 2.79 [0.30], p < .001), active time (b [SE] = 1.62 [0.16], p < .001), and steps (b [SE] = 112.21 [10.66], p < .001) increased during the second trimester followed by a precipitous decline during the third trimester. Sedentary behavior followed an opposite pattern (b = - 9.88 [1.07], p < .001). Overweight and obese women took significantly fewer steps/day (b [SE] = - 742.37 [362.57], p < .05 and - 855.94 [381.25], p < .05, respectively) than normal weight women, and obese women had less "active" minutes/day (~> 3.0 metabolic equivalents; b [SE] = - 12.99 [5.89], p < .05) than normal weight women (P's < 0.05). Women who self-identify as inactive, become more sedentary and less physically active as pregnancy progresses. This study was among the first to describe the trajectory of daily PA and sedentary behavior throughout pregnancy. This study may help inform health care provider and patient communication related to PA, sedentary behavior, and the time in which to communicate about these behaviors.

Keywords: Exercise; Health behaviors; Measurement; Women.

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Figures

Fig. 1
Fig. 1
Participant enrollment flow chart.
Fig. 2
Fig. 2
Changes in sedentary behavior (Panel A), light-intensity activity (Panel B), active time (Panel C), and steps (Panel D) per day over the course of pregnancy. Data are model-based estimates adjusted for age, race, ethnicity, income, education, number of chronic conditions, days of wear, gestational age at enrollment, and intervention arm.
See this image and copyright information in PMC

References

    1. Adams M., Sallis J., Norman G., Hovell M., Hekler E., Perata E. An adaptive physical activity intervention for overweight adults: a randomized controlled trial. PLoS ONE. 2013;8 - PMC - PubMed
    1. Ainsworth B.E., Haskell W.L., Herrmann S.D. 2011 compendium of physical activities: a second update of codes and MET values. Med. Sci. Sports Exerc. 2011;43:1575. - PubMed
    1. American College of Obstetricians and Gynecologists. Physical activity and exercise during pregnancy and the postpartum period. Obstet. Gynecol. 2015;(Committee Opinion No. 650:e135–42). - PubMed
    1. Artal R., O'Toole M. Guidelines of the American College of Obstetricians and Gynecologists for exercise during pregnancy and the postpartum period. Br. J. Sports Med. 2003;37:6–12. - PMC - PubMed
    1. Bassett D.R., Fraysse F., Rowlands A.V. Introducing novel approaches for examining the variability of individuals' physical activity. J. Sports Sci. 2015;33:457–466. - PubMed

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