We have previously found that the fetal heart rate remains normal when the mother performs short (30-seconds) high-intensity exercise bouts. In this study, we investigate the fetus' pulse and blood flow distribution during and immediately after a single high-intensity interval training session in pregnant women.

The aim of the study is to establish a time-efficient and safe way to exercise for pregnant women and to gain insight into some of the mechanisms of the beneficial effects of maternal exercise on fetal health and well-being.

In this project, women in their third trimester of pregnancy underwent one single interval session on a stationary bike at the Women's Clinic, St. Olavs Hospital. An experienced obstetrician performed ultrasound measurements of standard fetal biometric measurements and of blood flow to the different organs in the fetus before and immediately after the training session. The mother's heart rate, blood pressure, and body composition were also assessed.

We are currently analysing the data we have obtained in this study and hope to communicate the results soon.

The project is undertaken at Faculty of Medicine and Health Sciences, NTNU and is approved by The Regional Committee for Medical and Health Research Ethics.