Table 4. Cases with and without bradycardia during treadmill running. All variables are presented as means with SD.
| Variable | No bradycardian=50 | Bradycardian=6 |
|---|---|---|
| Gestational age (weeks) | 28.9 (2.6) | 30.0 (2.7) |
| Maternal age (years) | 32.0 (3.6) | 31.8 (1.5) |
| Exercise hours/week | 7.2 (3.4) | 6.3 (1.8) |
| Peak maternal heart rate (MHR) | 178.9 (7.3) | 176.0 (4.1) |
| Percentage of predicted MHRmax at peak | 91.1 (3.7) | 89.7 (2.1) |
| Fetal heart rate | ||
| Baseline | 139.6 (8.6) | 144.3 (4.8) |
| Exercise* | 148.4 (16.8) | 79.3 (20.2) |
| Umbilical artery PI | ||
| Baseline | 1.0 (0.2) | 1.0 (0.1) |
| Exercise* | 0.9 (0.1) | 1.2 (0.4) † |
| Uterine artery PI | ||
| Baseline | 0.7 (0.2) | 0.7 (0.2) |
| Exercise* | 0.7 (0.2) ‡ | 0.8 (0.2) § |
*
Mean of values from all five intervals.
†
Missing value for one athlete
‡
Missing values for two athletes
§
Missing values for three athletes
MHR, Maternal heart rate; PI, pulsatility index.