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Metabolic and Circulatory Responses to Running During Pregnancy
The Physician and Sportsmedicine
|July 22, 2016
Summary
Running during pregnancy becomes more strenuous as gestation advances. A pregnant runner experienced increased physiological stress, including higher oxygen uptake and ventilation, prompting recommendations to reduce running speed over time.
Area of Science:
- Exercise physiology
- Pregnancy physiology
Background:
- Maternal physiological adaptations during pregnancy significantly alter responses to exercise.
- Understanding the impact of progressive pregnancy on exercise capacity is crucial for maternal and fetal well-being.
Purpose of the Study:
- To quantify the metabolic and circulatory responses to submaximal running in a pregnant individual throughout gestation.
- To assess how physiological parameters change with advancing pregnancy during a consistent exercise bout.
Main Methods:
- A 32-year-old pregnant runner performed a 10-minute submaximal treadmill run at 6 mph monthly.
- Measurements included ventilation, oxygen uptake, heart rate, and respiratory exchange ratio during steady-state running.
Main Results:
- Significant increases in ventilation, oxygen uptake, heart rate, and respiratory exchange ratio were observed as pregnancy progressed.
- Oxygen uptake increase correlated directly with weight gain, while heart rate, ventilation, and respiratory exchange ratio did not show this direct proportionality.
Conclusions:
- Running imposes progressively greater physiological stress on the pregnant individual as pregnancy advances.
- Recommendations include gradually decreasing running speed to mitigate increased exercise strain during pregnancy.
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