Restricted blood flow may limit physical activity.
You’ve always considered yourself relatively fit for your age. You diligently swim and take group fitness classes. That was why it was surprising when you started feeling unusually winded during your workouts. In a recent class, you had to stop because you felt faint.
This let you to get a checkup and , eventually, a follow-up with a cardiologist. The diagnosis is a heart valve condition called aortic stenosis. Stenosis means narrowing or obstruction.
Source: Mayo Clinic Health Letter June 2014