So how aware are you of your heart-rate?<p>I&#x27;m keenly aware of when my heart-rate rises, I notice it jump if I sprint up a stairwell.  When it gets too high I can feel the pressure in my neck and temples.  I&#x27;m the most out of shape I&#x27;ve ever been at this point in my life and I&#x27;m alarmed sometimes at how often my heart-rate stays high after seemingly inconsequential physical exertion so I&#x27;m wondering if it&#x27;s something you tune out when you&#x27;re really out of shape or overweight.