Does Exercise Alter Blood Flow to the Uterus During Pregnancy?
BACKGROUND AND PURPOSE:
Despite recommendations, women tend to exercise less during pregnancy
May be related to safety concerns
Szymanski et al. (Obstetrics & Gynecology 2018) sought to determine the effect of typical exercise sessions on uterine artery blood flow
Current study was part of a prospective cross-sectional study of uterine artery Doppler velocimetry in healthy pregnant women after exercise
‘Exercisers’ or ‘nonexercisers’ based on self-reported physical activity
Regular physical activity: >20 minutes per session for ≥3 times per week during the 6 months prior to pregnancy or during pregnancy
Exercisers: Minimum regular physical activity
Nonexercisers: Did not meet requirements for minimal physical activity
Moderate-intensity exercise on treadmill (all participants)
40–59% of heart rate reserve
Vigorous-intensity exercise on treadmill (only exercisers)
60–84% of heart rate reserve
Uterine artery Doppler measures were obtained
After a 20-minute fetal heart tracing prior to the exercise session
Immediately after the exercise session
30 regular exercisers | 15 nonexercisers
Approximately 31+ weeks gestation
For moderate-intensity session
Mean uterine artery Doppler indices (pulsatility index, resistance index, systolic/diastolic ratio) did not significantly change with exercise
For vigorous-intensity session
Average maternal heart rate: 140 bpm (ranging from 123 to 156 bpm); dropped to 85±12 bpm post exercise
All mean uterine artery Doppler indices showed reductions postexercise
Pulsatility index: Decreased from 0.63 to 0.58 (P=.037)
Resistance index: Decreased from 0.47 to 0.44 (P=.028)
SD ratio: Decreased from 1.94 to 1.84 (P=.042)
Exercise according to current professional guidelines did not reduce uterine artery blood flow
Slight decreases in uterine artery Doppler indices
The authors state
Obstetric care providers have a unique opportunity to positively affect women’s health by encouraging regular physical activity because pregnancy is a time when women are more likely to focus on optimizing their own health and is thus an ideal time for both initiation and continuation of exercise.
Please log in to access ObGFirst and the 2T US Atlas
Media - Internet
Computer System Requirements
OBG Project CME requires a modern web browser (Internet Explorer 10+, Mozilla Firefox, Apple Safari, Google Chrome, Microsoft Edge). Certain educational activities may require additional software to view multimedia, presentation, or printable versions of their content. These activities will be marked as such and will provide links to the required software. That software may be: Adobe Flash, Apple QuickTime, Adobe Acrobat, Microsoft PowerPoint, Windows Media Player, or Real Networks Real One Player.
Disclosure of Unlabeled Use
This educational activity may contain discussion of published and/or investigational uses of agents that are not indicated by the FDA. The planners of this activity do not recommend the use of any agent outside of the labeled indications.
The opinions expressed in the educational activity are those of the faculty and do not necessarily represent the views of the planners. Please refer to the official prescribing information for each product for discussion of approved indications, contraindications, and warnings.
Participants have an implied responsibility to use the newly acquired information to enhance patient outcomes and their own professional development. The information
presented in this activity is not meant to serve as a guideline for patient management. Any procedures, medications, or other courses of diagnosis or treatment discussed or suggested in this activity should not be used by clinicians without evaluation of their patient’s conditions and possible contraindications and/or dangers in use, review of any applicable manufacturer’s product information, and comparison with recommendations of other authorities.
Jointly provided by
NOT ENOUGH CME HOURS
It appears you don't have enough CME Hours to take this Post-Test. Feel free to buy additional CME hours or upgrade your current CME subscription plan