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Irish Journal of Medical Science (1971 -)

, Volume 185, Issue 2, pp 357–370 | Cite as

Maternal obesity and physical activity and exercise levels as pregnancy advances: an observational study

  • N. Daly
  • C. Mitchell
  • M. Farren
  • M. M. Kennelly
  • J. Hussey
  • M. J. Turner
Original Article

Abstract

Background

Increases in clinical complications associated with maternal obesity have generated interest in increasing physical activity (PA) and exercise levels as an intervention to improve pregnancy outcomes.

Aims

The objective of this study was to examine the relationship between BMI categorisation and PA and exercise levels as pregnancy advances.

Methods

This was an observational study in a large university maternity hospital. Women were recruited at their convenience before they left hospital after delivering a baby weighing 500 g or more. They completed a detailed customised physical activity and exercise questionnaire. BMI categorisation was based on the measurement of weight and height in early pregnancy.

Results

Of the 155 women recruited, 42.5 % (n = 66) were primigravidas and 10.3 % (n = 16) were smokers. Mean Body Mass Index (BMI) was 24.6 kg/m2 and 14.2 % (n = 22) were obese, based on a BMI >29.9 kg/m2. Overall, women decreased their exercise from an average 194 min (range 0–650 min) per week pre-pregnancy to 98 min antenatally (range 0–420 min) (p < 0.0001). Obese women exercised least pre-pregnancy and antenatally at 187.5 and 75 min per week, respectively, compared with 193.2 and 95.5 min per week in the normal BMI group and 239.3 and 106.7 min per week in the overweight group. The mean gestation at which all women reduced their activity levels was 29 weeks.

Conclusions

We found that women decreased their PA  and exercise levels significantly in the third trimester and, thus, in the absence of a medical contra-indication there is considerable scope for an exercise intervention to improve activity  and exercise levels as pregnancy advances. However, an increase in PA levels in obese women needs further studies to determine whether it will improve the clinical outcomes for the woman and her offspring.

Keywords

Body mass index Maternal obesity Physical activity in pregnancy Exercise in pregnancy Questionnaire 

Notes

Compliance with ethical standards

Conflict of interest

None of the authors had any financial or other potential conflicts of interests concerning this study.

Role of the funding source

This study did not require any funding.

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Copyright information

© Royal Academy of Medicine in Ireland 2015

Authors and Affiliations

  • N. Daly
    • 1
  • C. Mitchell
    • 1
  • M. Farren
    • 1
  • M. M. Kennelly
    • 1
  • J. Hussey
    • 2
  • M. J. Turner
    • 1
  1. 1.UCD Centre for Human ReproductionCoombe Women and Infants University HospitalDublin 8Ireland
  2. 2.Discipline of Physiotherapy, School of Medicine, Trinity CollegeUniversity of DublinDublinIreland

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