by eezybizz.com
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The muscles of the human body respond to the intensity of overload in a
similar way that skin responds to the intensity of sunlight. Muscles adapt to
the stress of overload by getting larger; skin adapts to the stress of overload
by getting darker.
Each of the 600+ muscles in your body is accustomed to operating at a
certain level of output during normal daily activities. To cause new muscle
to grow you have to force your muscles to operate beyond their normal
level of output. That’s why we lift heavy weights to build muscles….it delivers
a higher intensity of overload.
Building new muscle is actually nature’s way of keeping you healthy. A demanding,
high intensity workout sends a message to the central nervous
system that says, in effect: “This much work is so draining that our existing
muscle strength can’t sustain it…we better build some new muscle so work
at this intensity isn’t so taxing.”
