Heat stress and fetal risk. Environmental limits for exercise and passive heat stress during pregnancy: a systematic review with best evidence synthesis

British Journal of Sports Medicine
Nicholas RavanelliOllie Jay

Abstract

Pregnant women are advised to avoid heat stress (eg, excessive exercise and/or heat exposure) due to the risk of teratogenicity associated with maternal hyperthermia; defined as a core temperature (Tcore) ≥39.0°C. However, guidelines are ambiguous in terms of critical combinations of climate and activity to avoid and may therefore unnecessarily discourage physical activity during pregnancy. Thus, the primary aim was to assess Tcore elevations with different characteristics defining exercise and passive heat stress (intensity, mode, ambient conditions, duration) during pregnancy relative to the critical maternal Tcore of ≥39.0°C. Systematic review with best evidence synthesis. EMBASE, MEDLINE, SCOPUS, CINAHL and Web of Science were searched from inception to 12 July 2017. Studies reporting the Tcore response of pregnant women, at any period of gestation, to exercise or passive heat stress, were included. 12 studies satisfied our inclusion criteria (n=347). No woman exceeded a Tcore of 39.0°C. The highest Tcore was 38.9°C, reported during land-based exercise. The highest mean end-trial Tcore was 38.3°C (95% CI 37.7°C to 38.9°C) for land-based exercise, 37.5°C (95% CI 37.3°C to 37.7°C) for water immersion exercise, 36.9°C (95% CI ...Continue Reading

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Citations

Feb 15, 2020·Journal of Primary Care & Community Health·Marjan Jahani KondoriMeghna P Mansukhani
Oct 20, 2018·British Journal of Sports Medicine·Margie H DavenportStephanie-May Ruchat
Jul 4, 2020·Journal of Perinatal Medicine·Ioannis TsakiridisMichail Chourdakis
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Feb 18, 2020·Journal of Obstetric, Gynecologic, and Neonatal Nursing : JOGNN·Marit L Bovbjerg, Veronica Irvin
Sep 8, 2020·Birth Defects Research·Jenna B Wowdzia, Margie H Davenport
Feb 29, 2020·Clinical Imaging·Mark Lum, A John Tsiouris
Apr 1, 2021·Journal of Midwifery & Women's Health·Mary K Barger
May 12, 2021·Environmental Research·David A Savitz, Hui Hu
Jul 29, 2021·Arquivos brasileiros de cardiologia·Milena Dos Santos Barros CamposLuiz Eduardo Mastrocola
Aug 8, 2021·Experimental Gerontology·Rhonda P Patrick, Teresa L Johnson
Aug 24, 2021·Journal of Thermal Biology·Sheila DervisKristi Bree Adamo
Sep 4, 2021·Journal of Perinatal Medicine·Maria Margarida RibeiroInês Nunes

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