Accelerated respiratory response to moderate exercise in late pregnancy
| Autor: | James Metcalfe, Marilyn S. Paul, Miles J. Edwards, Marcia J. Dunham |
|---|---|
| Rok vydání: | 1981 |
| Předmět: |
Adult
Pulmonary and Respiratory Medicine Physiology business.industry Muscles Pregnancy Trimester Third Respiration Distended veins Physical Exertion Postpartum Period Venous blood Carbon dioxide production Carbon Dioxide Late pregnancy Oxygen Consumption Animal science Pregnancy Regional Blood Flow Respiratory response Anesthesia Moderate exercise Humans Medicine Female business |
| Zdroj: | Respiration Physiology. 45:229-241 |
| ISSN: | 0034-5687 |
| DOI: | 10.1016/0034-5687(81)90008-6 |
| Popis: | We studied the rates of change of expired ventilation (V E , BTPS), O 2 , STPD) and CO 2 production (V CO 2 , STPD) at the start and stop of 6 min of 50-W bicycle exercise, comparing 20 healthy young women at 38 weeks of pregnancy (G) and 3 months postpartum (NG). V O 2 , V CO 2 and VE were significantly greater at rest for G than for NG. The absolute increases of V O 2 and V CO 2 from steady-state rest (SSR) to steady-state exercise (SSE) were the same for G and NG. The absolute increase of V E from SSR to SSE was significantly greater for G than NG. V CO 2 and V E increased more rapidly in G than NG, but only during the first 90 sec of exercise. Recovery rates after exercise were equal for G and NG. We believe that lower extremity muscles of G contract on more distended veins at the onset of exercise, forcing increased volumes of venous blood through the lungs, increasing V O 2 and V CO 2 . V E follows V CO 2 closely. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|