Maternal and fetal physiological responses to left lateral and supine rest (including 0° and 30° incline) positions and to supine exercise position (data from observational studies that included acute supine exercise)
| Author | Maternal outcomes | Fetal outcomes | |||||||||||||||||||
| SBP (mm Hg) | DBP (mm Hg) | Mean arterial pressure (mm Hg) | HR (bpm) | FHR (bpm) | UBF (cc/min) | Bradycardia (n) | |||||||||||||||
| Base | SupE | Rec | Base | SupE | Rec | Base | SupE | Rec | Base | SupE | Rec | Base | SupE | Rec | Base | SupE | Rec | Base | SupE | Rec | |
| Green et al 22 | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | N/R | * | * | * | N/R | N/R | N/R | 1 | 0 | 0 |
| Nesler et al 19 | N/R | N/R | N/R | N/R | N/R | N/R | GR1: 69 (7) | GR1: 84 (8)† | GR1: 69 (9) | GR1: 77 (9) | GR1: 87 (10)† | GR1: 76 (11) | GR1: 137 (8)‡ | GR1: 142 (9) | GR1: 143 (8) | N/R | N/R | N/R | GR1: 1 | GR1: 0 | GR1: 0 |
| GR2: 73 (6) | GR2: 86 (8)† | GR2: 74 (8) | GR2: 75 (5) | GR2: 92 (12)† | GR2: 73 (6) | GR2: 134 (10) | GR2: 134 (9) | GR2: 138 (9) | GR2: 0 | GR2: 0 | GR2: 0 | ||||||||||
| Jeffreys et al 20 | LLR: 112 (11) | 133 (13)† | LLR: 111 (5) | LLR: 66 (6) | 86 (12)† | LLR: 67 (10) | LLR: 81 (6) | 102 (12)† | LLR: 82 (10) | LLR: 76 (9) | 98 (12)† | LLR: 78 (9) | LLR: 136 (10) | 144 (15) † | LLR: 137 (8) | LLR: 410 (93) | 355 (125) ¶ | LLR: 409 (170) | N/R | N/R | N/R |
| SupR: 110 (12) 0° incline | SupR: 67 (10) | SupR: 81 (10) | SupR: 78 (9) | SupR: 132 (12) | SupR: 267 (73)§ | ||||||||||||||||
| Avery et al, 23 mean (SE) | 112.8 (3) | SupDL: 154.2 (1.8) | N/R | 78.82 (2.20) | SupDL: 117.40 (1.65) | N/R | N/R | N/R | N/R | 94.4 (3.3) | SupDL: 129.7 (2.22) | N/R | 137 (2) | SupDL: 139 (3) | SupDL: 139 (3) | N/R | N/R | N/R | 1 | SupDL: 1 | SupDL: 2 |
| 30° incline | SupSL: 146.4 (3) | SuSL: 110.24 (1.65) | SupSL: 123.3 (3.07) | SupSL: 1 | SupSL: 1 | ||||||||||||||||
Data are presented as mean (SD) unless otherwise stated.
*FHR data were not given but rather tracings were assessed for reduced variability, bradycardia and tachycardia. At rest, 4 of 25 women had abnormal FHR patterns (as determined by author); during supine exercise, 8 other women presented with abnormal FHR patterns.
†Significantly different from the left lateral rest position.
‡Two women were excluded from the study based on abnormal FHR patterns (one had bradycardia) that occurred on turning from the left lateral position to the supine position and did not participate in the supine exercise.
§Significantly different from left lateral rest position, representing −34±11% change in UBF to the supine rest position.
¶No significant change from left lateral rest position, representing −16±23% change in UBF to supine exercise. Avery et al 23 has been included as an observational study.
Base, baseline; bpm, beats per minute; DBP, diastolic blood pressure; FHR, fetal heart rate; GR, group; GR1, second trimester; GR2, third trimester; HR, heart rate; LLR, left lateral rest position; N/R, not reported; Rec, postexercise recovery; SBP, systolic blood pressure; SupDL, supine double leg extension; SupE, supine exercise; SupSL, supine single leg extension; SupR, supine rest position; UBF, uterine blood flow.