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Prenatal exercise is not associated with fetal mortality: a systematic review and meta-analysis

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Author
Davenport, M.H.
Kathol, Amariah
Mottola, Michelle
Skow, Rachel
Meah, Victoria L.
Poitras, Veronica
Jaramillo Garcia, Alejandra
Gray, Casey
Barrowman, Nick
Riske, Laurel
Sobierajski, F.
James, Marina
Nagpal, Taniya
Marchand, Andree-Anne
Slater, Linda
Adamo, Kristi
Davies, Gregory
Barakat, Ruben
Ruchat, Stephanie-May
Date
2018-10-18
Acceptance date
2018-08-12
Type
Article
Publisher
BMJ Publishing Group
ISSN
1473-0480
Metadata
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Abstract
Objective. To perform a systematic review of the relationship between prenatal exercise and fetal or newborn death. Design. Systematic review with random-effects meta-analysis and meta-regression. Data sources. Online databases were searched up to 6 January 2017. Study eligibility criteria. Studies of all designs were included (except case studies) if they were published in English, Spanish or French and contained information on the population (pregnant women without contraindication to exercise), intervention (subjective or objective measures of frequency, intensity, duration, volume or type of exercise, alone [“exercise-only”] or in combination with other intervention components [eg, dietary; “exercise + co-intervention”]), comparator (no exercise or different frequency, intensity, duration, volume and type of exercise) and outcome (miscarriage or perinatal mortality). Results. Forty-six studies (n=2 66 778) were included. There was ‘very low’ quality evidence suggesting no increased odds of miscarriage (23 studies, n=7125 women; OR 0.88, 95% CI 0.63 to 1.21, I2=0%) or perinatal mortality (13 studies, n=6837 women, OR 0.86, 95% CI 0.49 to 1.52, I2=0%) in pregnant women who exercised compared with those who did not. Stratification by subgroups did not affect odds of miscarriage or perinatal mortality. The meta-regressions identified no associations between volume, intensity or frequency of exercise and fetal or newborn death. As the majority of included studies examined the impact of moderate intensity exercise to a maximum duration of 60 min, we cannot comment on the effect of longer periods of exercise. Summary/conclusions. Although the evidence in this field is of ‘very low’ quality, it suggests that prenatal exercise is not associated with increased odds of miscarriage or perinatal mortality. In plain terms, this suggests that generally speaking exercise is ‘safe’ with respect to miscarriage and perinatal mortality.
Journal/conference proceeding
British Journal of Sports Medicine;
Citation
Davenport, M.H., Kathol, A.J., Mottola, M.F., Skow, R.J., Meah, V.L., Poitras, V.J., Garcia, A.J., Gray, C.E., Barrowman, N., Riske, L., Sobierajski, F. et al (2019) 'Prenatal exercise is not associated with fetal mortality: a systematic review and meta-analysis', British Journal of Sports Medicine, 53(2), pp.108-115. DOI: 10.1136/bjsports-2018-099773.
URI
http://hdl.handle.net/10369/10413
DOI
http://dx.doi.org/10.1136/bjsports-2018-099773
Description
Article published in British Journal of Sports Medicine on 18 October 2018, available at: http://dx.doi.org/10.1136/bjsports-2018-099773.
Rights
http://www.rioxx.net/licenses/all-rights-reserved
Sponsorship
Cardiff Metropolitan University (Grant ID: Cardiff Metropolian (Internal))
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