Exercise With Angina: Training a Heart That Runs Short of Oxygen - What Cardiac Rehabilitation Can and Cannot Promise

Angina is the heart's way of reporting a shortfall: for a few minutes under load, the muscle needs more oxygen than its narrowed arteries can deliver, and it aches. The instinctive response is to avoid the load. The medical response, for most people with stable angina, is the reverse - a structured, supervised exercise programme that raises the threshold at which the shortfall appears. The evidence for that programme is honest rather than triumphant: it reliably improves fitness, it probably reduces the need for repeat procedures, and it has not yet been shown to save lives in this specific group.

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