Before we
can get into doing pelvic tilts, you have to learn proper sitting posture and be
sitting on your sit bones. You
should actually always sit on your sit bones, but it is so much easier to roll
back on your tailbone... This is another discussion which you can learn
about here...
Here
is a postural exercise to find your sit bones, and learn proper sitting posture.
Stand
and push your hand into the crease between your buttock and the back of your
thigh.
Keep
your hand in this location as you sit down on a hard chair. You should feel
your sit bone on your hand.
If
you don't, tilt you hips back and forth and you should feel it.
Now
balance on your sit bones - you will be leaning much further forward than you
usually do, and be sitting much taller.
Move
all the way forward in the chair until you thighs are free of the chair, but
you are still on your sit bones.
You
are probably still leaning too far back, creating lots of work for your
muscles. (See the image Sitting at attention above).
Now
slowly rock forward on your sit bones - can you let some of those muscles go
now?
Your
final position will feel too far forward, because you are not used to it.
If
you have a mirror, use it to evaluate your posture and compare it with the
picture here. Start with short periods of time in this position until you get
stronger.
Ok,
remember how to do all that, because you will need it for the next part of the
exercise.