Upright position
Upright position has been studied in 1 paper since 2018: 1 trial in people. The newest paper, Sep 1, 2018: “Age-dependent effects of thoracic and capillary blood volume distribution on pulmonary artery pressure and lung diffusing capacity”.
1 paper studies it2 findingsUpdated
“mPAP (P ≤ 0.029) and Q (P ≤ 0.032) were lower in the Upright versus Supine and Head-down positions”
None of its findings points the other way.
- 1 lab in 1 country
- Funders: Center for Clinical and Translational Science, Mayo Clinic and 6 more
- Human trial1
Studies in people
1 study gave upright position to people and measured what changed.
down: Decreases mean pulmonary artery pressure
down: Decreases stroke volume
Trial9 people71 ± 4 years
Older adults; older adults only
Physiological reports, Sep 1, 2018
What did studies of Upright position find?
2Studies of Upright position measured 2 outcomes; the most studied are stroke volume (1 study) and mean pulmonary artery pressure (1).
Stroke volume
downin humans1
1 study
Stroke volume
downin humans1
Upright position decreases stroke volume in humans (compared with supine and head-down positions).
“SV was lower in the Upright versus Supine and Head-down positions in both younger (P ≤ 0.008) and older (P ≤ 0.003) adults.”
Human trialcompared with supine and head-down positions
Physiological reports
Mean pulmonary artery pressure
downin humans1
1 study
Mean pulmonary artery pressure
downin humans1
Upright position decreases mean pulmonary artery pressure in humans (older adults only; compared with supine and head-down positions).
“mPAP (P ≤ 0.029) and Q (P ≤ 0.032) were lower in the Upright versus Supine and Head-down positions”
Human trialolder adults only; compared with supine and head-down positionsn = 9
Physiological reports