Mottola et al developed equations for determining the target heart rate during exercise for a pregnant woman. The authors are from the University of Western Ontario in London, Ontario.
Patient selection: pregnant woman from 16 to 22 weeks gestation
The target heart rate is that associated with 60-80% of aerobic capacity.
Parameters:
(1) peak oxygen consumption in mL per kg per minute
(2) age
(3) fitness level
Age
Fitness Level
Target Heart Rate in beats/minute
20 - 29
unfit
(3.933 * (VO2)) + 86.088
20 - 29
active
(4.146 * (VO2)) + 73.152
20 - 29
fit
(2.372 * (VO2)) + 100.169
30 - 39
unfit
(4.452 * (VO2)) + 79.310
30 - 39
active
(4.078 * (VO2)) + 74.428
30 - 39
fit
(2.557 * (VO2)) + 93.194
where:
• The equation for predicting peak oxygen consumption in a pregnant woman is in 36.03.13.
According to the PARmed-X for Pregnancy document the target heart rate for a low risk pregnant woman 20-29 years of age should be 135-150 beats per minute.
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