value of aerobic exercise is endless. It is the key
to improving oneís overall level-of-fitness.
Aerobic exercise increases cardiovascular fitness,
which in turn increases total metabolism.
Cardiovascular fitness refers to the ability of the
heart, lungs, and arteries to deliver oxygen (which
is carried in the blood) to working muscles, and
the musclesí ability to use that oxygen to
perform work, over a particular period of time.
Increasing oneís level of cardiovascular fitness,
means increasing the rate at which the body burns
Working in the Cardio Zone is important for
increasing cardiovascular and cardio-respiratory
fitness. When the body is challenged to work harder
and longer in this Zone, it sends a message to the
brain to supply more oxygen to get the work done.
The bodyís elevated need for oxygen triggers higher
breathing rates and an increased heart rate. The
body is forced to develop a greater ability to
utilize the increased oxygen output. Utilizing
oxygen is the job of aerobic enzymes. As the demand
for more oxygen increases, the demand for more
aerobic enzymes to handle that oxygen increases.
Increasing aerobic enzymes is a gradual process.
Thatís why it takes time to build up the ability to
work in the Cardio Zone for a longer period of
time. Consistently sending the message for more
oxygen, ultimately strengthens the heart and lungs.
The more intense the aerobic exercise becomes, the
more aerobic enzymes will be available in the
muscles, resulting in greater cardiovascular
fitness, higher overall metabolism, and a reduction
in body fat.
Because itís impossible sustain a high level of
aerobic intensity forever, it becomes necessary to
slow intensity down. Itís important to continue the
aerobic activity at a lower level of intensity, in
the Fat Burn Zone. When this is done, the
body recruits different muscle fibers to continue
the work. These fibers use stored fat as an energy
burning source, and metabolism continues at full
throttle. The beauty of doing a complete aerobic
workout ( cardio zone and fat burn zone) is
the amount of after-burn the body experiences, when
the workout is complete.