Table 1.
Study population characteristics.
| Demographics | Equation development (n = 13) | Cross-validation 1 (n = 6) | Cross-validation 2 (n = 7) |
|---|---|---|---|
| Age (years) | 31.2 ± 3.5 | 33.5 ± 3.3 | 29.3 ± 2.6* |
| Gestational age (weeks) | 20.5 ± 5.0 | 18.8 ± 5.5 | 22.0 ± 4.4 |
| Height (cm) | 166.7 ± 5.4 | 167.7 ± 4.0 | 165.8 ± 6.5 |
| Weight at visit (kg) | 69.6 ± 10.3 | 70.2 ± 11.0 | 69.0 ± 10.5 |
| Gestational weight gain (kg) | 5.8 ± 3.9 | 4.8 ± 4.3 | 6.7 ± 4.3 |
| Pre-pregnant body weight (kg) | 63.7 ± 9.5 | 65.4 ± 9.5 | 62.3 ± 10.0 |
| Pre-pregnant BMI (kg·m−2) | 23.7 ± 3.6 | 23.4 ± 3.9 | 24.0 ± 3.5 |
| Resting HR (bpm) | 81 ± 14.5 | 73 ± 11 | 89 ± 14* |
| Incremental submaximal walking test | |||
| Speed to reach the upper limit of 40–59% HRR (mph) | 3.4 ± 0.4 | 3.7 ± 0.5 | 3.4 ± 0.3 |
| Moderate-intensity exercise session | |||
| 40% HRR (bpm) | 125 ± 9.5 | 119 ± 6.1 | 130 ± 9.2* |
| 60% HRR (bpm) | 146 ± 7.1 | 141 ± 4.2 | 150 ± 6.8* |
Note.
*
p < 0.05.
BMI = body mass index; HR = heart rate; HRR = heart rate reserve; bpm = beats per minute.