title: Exploratory analysis of exercise adherence patterns with sedentary pregnant women.
abstract: BACKGROUND
  It is not well understood how sedentary women who wish to engage in regular exercise adhere to interventions during pregnancy and what factors may influence adherence over time.
  
  
  OBJECTIVE
  The aim of this study was to examine longitudinal patterns of pregnant women's adherence to exercise.
  
  
  METHODS
  Exploratory secondary data analyses were carried out with 124 previously sedentary pregnant women (ages 31 +/- 5 years; 85% non-Hispanic White) from a randomized controlled trial. Daily exercise logs (n = 92) from 18 through 35 weeks of gestation were explored using linear regression, functional data, and principal component analyses.
  
  
  RESULTS
  Adherence decreased as gestation week increased (p < .001). The top adherers maintained levels of adherence, and the bottom adherers decreased levels of adherence. And adherence pattern was influenced by types of exercise throughout the study period.
  
  
  CONCLUSIONS
  Exercise behavior patterns were explored in a randomized controlled trial study, using chronometric data on exercise attendance. A new analytic approach revealed that sedentary pregnant women may adopt exercise habits differently from other populations.
authors.affiliation: School of Nursing, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7460, USA. syeo@email.unc.edu
authors.forename: SeonAe
authors.initials: S
authors.lastname: Yeo
authors.forename: Jessi
authors.initials: J
authors.lastname: Cisewski
authors.forename: Eric F
authors.initials: EF
authors.lastname: Lock
authors.forename: J S
authors.initials: JS
authors.lastname: Marron
mesh_terms: D000328:Adult; D005081:Exercise Therapy / Q000523:psychology* / Q000706:statistics & numerical data; D005260:Female; D005865:Gestational Age; D006184:Habits; D006801:Humans; D033182:Intention; D016014:Linear Models; D008137:Longitudinal Studies; D008960:Models, Psychological; D052580:Muscle Stretching Exercises / Q000706:statistics & numerical data; D015404:Nursing Methodology Research; D010349:Patient Compliance / Q000523:psychology* / Q000706:statistics & numerical data; D011225:Pre-Eclampsia / Q000453:epidemiology / Q000517:prevention & control; D011247:Pregnancy / Q000523:psychology*; D025341:Principal Component Analysis; D036301:Qualitative Research; D016032:Randomized Controlled Trials as Topic; D057185:Sedentary Behavior; D020377:Self Efficacy; D016138:Walking / Q000523:psychology / Q000706:statistics & numerical data