The influence of exercise intensity on the umbilical artery flow velocity waveform and foetal heart rate responses to moderate duration, semi-supine cycling in late pregnancy
| Deutscher übersetzter Titel: | Einfluss der Belastungsintensitaet auf die Pulswellengeschwindigkeit in der A. umbilicalis und auf die Herzfrequenzreaktionen des Foetus auf halbliegende Fahrradergometerbelastung von maessiger Dauer |
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| Autor: | ONeill, Maureen E.; Cooper, Karen A.; Cook, Colleen M.; Trudinger, Brian J.; Boyce, E. Stewart; Hunyor, Stephen N. |
| Erschienen in: | Australian journal of science & medicine in sport |
| Veröffentlicht: | 23 (1991), 4, S. 101-104, Lit. |
| Format: | Literatur (SPOLIT) |
| Publikationstyp: | Zeitschriftenartikel |
| Medienart: | Gedruckte Ressource |
| Sprache: | Englisch |
| ISSN: | 0813-6289 |
| Schlagworte: | |
| Online Zugang: | |
| Erfassungsnummer: | PU199408057074 |
| Quelle: | BISp |
Abstract des Autors
At 34 to 38 weeks of gestation, healthy women with uncomplicated singleton pregnancies exercised for 12 minutes on a semi-supine bicycle. The influence of exercise intensity on the immediate post-exercise response of the ratio of the umbilical artery (UA) peak-systolic (A) to end-diastolic (B) flow velocities was assessed by Doppler velocimetry. The UA A/B ratio and foetal heart rate (FHR) responses to exercise varied with different exercise intensities. With maternal heart rates of 140 bpm or less (Mean 129.7 bpm, SD +/- 10.5, N = 10), there were no significant changes in the UA A/B ratio or FHR (p > 0.05). In contrast, after cycling at maternal heart rates of more than 140 bpm (Mean 154.5 bpm, SD +/- 8.5, N = 8), the FHR increased (p < 0.005) and the decrease in the UA A/B ratio (p < 0.05) suggested that downstream placental vascular resistance decreased. The changes in the UA A/B ratio and FHR resolved within 10 minutes. These findings are discussed in relation to exercise prescription in pregnancy and clinical tests. Verf.-Referat