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Exercise in pregnant women and birth weight: a randomized controlled trial.

Haakstad LA, Bø K - BMC Pregnancy Childbirth (2011)

Bottom Line: To date there are contradictory results regarding the role of physical activity on birth weight.There was no statistically significant difference between groups in mean birth weight, low birth weight (< 2500 g) or macrosomia (≥ 4000 g).Per protocol analyses showed higher Apgar score (1 min) in the EG compared with the CG (p = 0.02).

View Article: PubMed Central - HTML - PubMed

Affiliation: Norwegian School of Sport Sciences, Department of Sports Medicine, Ullevål Stadion 0806 Oslo, Norway. lahaakstad@nih.no

ABSTRACT

Background: Birth weight plays an important role in infant mortality and morbidity, childhood development, and adult health. To date there are contradictory results regarding the role of physical activity on birth weight. In addition, it is questioned whether exercise during second and third trimesters of pregnancy might affect gestational age and increase the risk of preterm delivery. Hence, the purpose of this study was to examine the effect of a supervised exercise-program on birth weight, gestational age at delivery and Apgar-score.

Methods: Sedentary, iparous pregnant women (N = 105), mean age 30.7 ± 4.0 years, pre-pregnancy BMI 23.8 ± 4.3 were randomized to either an exercise group (EG, n = 52) or a control group (CG, n = 53). The exercise program consisted of supervised aerobic dance and strength training for 60 minutes, twice per week for a minimum of 12 weeks, with an additional 30 minutes of self-imposed physical activity on the non-supervised week-days.

Results: There was no statistically significant difference between groups in mean birth weight, low birth weight (< 2500 g) or macrosomia (≥ 4000 g). Per protocol analyses showed higher Apgar score (1 min) in the EG compared with the CG (p = 0.02). No difference was seen in length of gestation.

Conclusion: Aerobic-dance exercise was not associated with reduction in birth weight, preterm birth rate or neonatal well-being.

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Trial profile showing the flow of participants through the randomized controlled trial.
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Figure 1: Trial profile showing the flow of participants through the randomized controlled trial.

Mentions: In total, the participants were examined three times during the study period. The first visit was between 12 and 24 weeks of gestation (baseline visit), the second at week 36-38 (after the intervention) and the last 6-12 weeks after delivery (postpartum visit). Each visit lasted approximately 60-75 minutes. Figure 1 illustrates the flow chart, including drop-outs and reasons for withdrawal. Some women who were lost to the second visit and test after the intervention (lost to follow up), re-entered the study at the postpartum examination. There was no financial compensation to the participants.


Exercise in pregnant women and birth weight: a randomized controlled trial.

Haakstad LA, Bø K - BMC Pregnancy Childbirth (2011)

Trial profile showing the flow of participants through the randomized controlled trial.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3198740&req=5

Figure 1: Trial profile showing the flow of participants through the randomized controlled trial.
Mentions: In total, the participants were examined three times during the study period. The first visit was between 12 and 24 weeks of gestation (baseline visit), the second at week 36-38 (after the intervention) and the last 6-12 weeks after delivery (postpartum visit). Each visit lasted approximately 60-75 minutes. Figure 1 illustrates the flow chart, including drop-outs and reasons for withdrawal. Some women who were lost to the second visit and test after the intervention (lost to follow up), re-entered the study at the postpartum examination. There was no financial compensation to the participants.

Bottom Line: To date there are contradictory results regarding the role of physical activity on birth weight.There was no statistically significant difference between groups in mean birth weight, low birth weight (< 2500 g) or macrosomia (≥ 4000 g).Per protocol analyses showed higher Apgar score (1 min) in the EG compared with the CG (p = 0.02).

View Article: PubMed Central - HTML - PubMed

Affiliation: Norwegian School of Sport Sciences, Department of Sports Medicine, Ullevål Stadion 0806 Oslo, Norway. lahaakstad@nih.no

ABSTRACT

Background: Birth weight plays an important role in infant mortality and morbidity, childhood development, and adult health. To date there are contradictory results regarding the role of physical activity on birth weight. In addition, it is questioned whether exercise during second and third trimesters of pregnancy might affect gestational age and increase the risk of preterm delivery. Hence, the purpose of this study was to examine the effect of a supervised exercise-program on birth weight, gestational age at delivery and Apgar-score.

Methods: Sedentary, iparous pregnant women (N = 105), mean age 30.7 ± 4.0 years, pre-pregnancy BMI 23.8 ± 4.3 were randomized to either an exercise group (EG, n = 52) or a control group (CG, n = 53). The exercise program consisted of supervised aerobic dance and strength training for 60 minutes, twice per week for a minimum of 12 weeks, with an additional 30 minutes of self-imposed physical activity on the non-supervised week-days.

Results: There was no statistically significant difference between groups in mean birth weight, low birth weight (< 2500 g) or macrosomia (≥ 4000 g). Per protocol analyses showed higher Apgar score (1 min) in the EG compared with the CG (p = 0.02). No difference was seen in length of gestation.

Conclusion: Aerobic-dance exercise was not associated with reduction in birth weight, preterm birth rate or neonatal well-being.

Show MeSH