During regular sitting (like in a chair) the seat bones are there to
support your body weight. The same applies when riding a bike. The red areas in
the below picture are able to withstand high pressure. However, when riding a
bike in an athletic, forward leaning position, the pubic area (shaded green) and
pubic bones (yellow) will come in contact with the saddle. A complex network of
nerves and blood vessels expands from the anus rectus area passed the genitalia
to the upper pubic bone.

This network expands laterally passed the right and left pubic bones. These
bones are able to accept light pressure, but a pressure reduction is essential
when considering a saddle. The lowered saddle nose of the step saddle, developed
by SQ-lab, achieves a uniform and well balanced pressure reduction in the pubic
area pubic bones.

Pressure measurement map: A foil with inlayed sensors is placed on the
saddle. As soon as the rider sits down on the saddle, the approximately 100
sensors will register the forces exerted on the saddle. These measurements can
be carried out statically, while on a bike trainer, like a roller, or
dynamically, out on the road, where the data will be transmitted wirelessly. The
exerted force and pressure distribution is displayed in different colors: blue
indicates little pressure, the colors turquoise, green, yellow, orange and red
indicate the increase in pressure. The above map is a result of the measurements
taken from a male rider weighing 165 lbs. at a height of 5'11", riding in a
sitting position between "athletic" and "moderate" (an angle of approx. 30
degrees).