| AB
CRUNCH
To
work the abdominal wall, we must shorten the distance
between the rib cage & the pelvis.
As
these two points come together, the abdominal muscles
should be tight,
like
you are pulling your navel to your spine, throughout
the full range of motion. The
joint, in motion, is the spine.
This
exercise can be done lying on the floor, lying over
a fitness ball, or even on a machine. There
are many arm placement variations. Arms extended
over the knees is a lighter load. Fists
under the chin prevent the head from moving, unnecessarily
and increases the level of difficulty. Hands
behind the head offer support for the neck and head
but make the weight of your upper body increase. Without
support, you neck may fatigue initially, however,
with constant practice, it will strengthen and not distract
from focusing on contracting and stretching the
abs, during the exercise.
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