Heart rate ranges for pregnant women
| Maternal age | Intensity | Heart rate range (beats/min) |
| <29 | Light | 102–124 |
| Moderate | 125–146 | |
| Vigorous | 147–169* | |
| 30+ | Light | 101–120 |
| Moderate | 121–141 | |
| Vigorous | 142–162* |
Moderate-intensity physical activity (40%–59% heart rate reserve (HRR)); vigorous-intensity physical activity (60%–80% HRR).
Target heart rate ranges were derived from peak exercise tests in medically screened, low-risk pregnant women.26 27
*As there is minimal information regarding the impact of physical activity at the upper end of the vigorous-intensity heart rate ranges, women wishing to be active at this intensity (or beyond) are encouraged to consult their obstetric care provider.