title: Hemodynamic responses to single sessions of aerobic exercise and resistance exercise in pregnancy.
abstract: BACKGROUND
  Previous research on maternal hemodynamic responses to a single exercise session during pregnancy is sparse, especially considering immediate responses to resistance exercise. The aim of the study was to examine blood pressure, heart rate, body temperature, and Rating of Perceived Exertion in healthy pregnant women during single sessions of continuous submaximal exercise in pregnancy week 21.
  
  
  METHODS
  A cross-over design was used. Twenty healthy pregnant women from four prenatal clinics in Gothenburg, Sweden, were included. On day 1, the women did 30 min of aerobic exercise and on day 3 they did 30 min of resistance exercise. Blood pressure, heart rate, and Rating of Perceived Exertion were measured after 15 and 30 min of exercise.
  
  
  RESULTS
  After 15 and 30 min of exercise, there was a significant increase in systolic blood pressure and heart rate (p < 0.001). Diastolic blood pressure increased slightly more after 15 and 30 min of aerobic exercise (p = 0.01) than resistance exercise (p = 0.03). Resistance exercise was perceived as more intense than aerobic exercise after 15 min (p = 0.02) and 30 min (p = 0.001) of exercise. Five minutes after completing the exercise, blood pressure quickly reverted to normal although heart rate was still increased (p = 0.001). There was no correlation between heart rate and Rating of Perceived Exertion (rs  = 0.05-0.43).
  
  
  CONCLUSIONS
  Maternal hemodynamic responses were essentially the same, regardless of whether the exercise was submaximal aerobic or resistance exercise, although resistance exercise was perceived as more intense. Aerobic and resistance exercise corresponding to "somewhat hard" seems to have no adverse effect with regard to maternal hemodynamic responses in healthy pregnancy.
authors.affiliation: Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden.
authors.forename: Karolina
authors.initials: K
authors.lastname: Petrov Fieril
authors.affiliation: Prenatal Care Unit, Närhälsan Primary Care, Gothenburg, Sweden.
authors.forename: Anna
authors.initials: A
authors.lastname: Glantz
authors.affiliation: Institute of Neuroscience and Physiology, University of Gothenburg, Gothenburg, Sweden.
authors.forename: Monika
authors.initials: M
authors.lastname: Fagevik Olsen
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology*; D018592:Cross-Over Studies; D003971:Diastole / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D005082:Physical Exertion / Q000502:physiology; D011247:Pregnancy / Q000502:physiology*; D055070:Resistance Training; D013599:Systole / Q000502:physiology
keywords: Aerobic exercise; blood pressure; heart rate; pregnancy; resistance exercise