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The “Heartbreak” of Older Age
Table 1.
Exhaustive Upright Exercise Changes In Aerobic Capacity And Cardiac Regulation Between Ages of 20 And 80 Years In Healthy Men and Women
| EDV, End Diastolic Volume; ESV, End Systolic Volume; PVR, Peripheral Vascular Resistance; AV, arterio-venous. | |
| Oxygen Consumption | ↓ (50%) |
| (A-V)O2 | ↓ (25%) |
| Cardiac Index | ↓ (25%) |
| Heart Rate | ↓ (25%) |
| Stroke Volume | no Δ |
| Preload | |
| EDV | ↑ (30%) |
| Afterload | |
| Vascular (PVR) | ↑ (30%) |
| Cardiac (ESV) | ↑ (275%) |
| Cardiac (EDV) | ↑ (30%) |
| Contractility | ↓ (60%) |
| Ejection Fraction | ↓ (15%) |
| Plasma Catecholamines | ↑ |
| Cardiac and Vascular | |
| Responses to ß-adrenergic stimulation | ↓ |
