Physiologic responses of cardiac patients to supine, recumbent, and upright cycle ergometry
| Autor: | William B. Olney, Timothy J. Quinn, Robert Kertzer, Samuel W. Smith, Neil B. Vroman |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Male
medicine.medical_specialty Supine position Heart Diseases Posture Hemodynamics Physical Therapy Sports Therapy and Rehabilitation Electrocardiography Oxygen Consumption Internal medicine Heart rate medicine Humans Respiratory exchange ratio Aged Rating of perceived exertion Analysis of Variance business.industry Rehabilitation Middle Aged Respiratory Function Tests Rate pressure product Blood pressure Exercise Test Physical therapy Cardiology business Respiratory minute volume |
| Zdroj: | Archives of Physical Medicine and Rehabilitation. 76:257-261 |
| ISSN: | 0003-9993 |
| DOI: | 10.1016/s0003-9993(95)80612-1 |
| Popis: | Physiological responses were compared in nine stable male cardiac patients (mean +/- standard error (SE): age, 68.3 +/- 8.1 years; height, 172.7 +/- 3.9cm; weight, 72.8 +/- 14.5kg) during stationary cycling in the supine, recumbent, and upright positions. A discontinuous exercise protocol was performed in which each stage included 3 minutes of exercise and 1 minute of recovery. Each subject's workload started at 150kgm.min-1 and increased by 150kgm.min-1 per stage until volitional fatigue. Testing sessions were randomized and performed 1 week apart. Subjects continued their normal medication regimen. All subjects were participants in a community-based cardiac rehabilitation program. Dependent variables were assessed at two different intensities; submaximal (300kgm.min +/- 1) and maximal. A two-way repeated measures ANOVA found no significant differences in systolic blood pressure (SBP), diastolic blood pressure (DBP), minute ventilation (VE), respiratory exchange ratio (R), rate pressure product (RPP), and rating of perceived exertion (RPE) at submaximal (300kgm.min +/- 1) and maximal exercise efforts. Heart rate (HR) was significantly lower (p < or = .05) in the supine position compared with either the upright or recumbent positions during the submaximal workload. In addition, oxygen uptake (VO2) was significantly lower in the supine position at the submaximal workload (p < or = .05) compared with both upright and recumbent. No difference in HR or VO2 was observed at maximal exercise. Regressions of HR on VO2 showed similar slopes and intercepts for supine, recumbent, and upright ergometry.(ABSTRACT TRUNCATED AT 250 WORDS) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|