test of energy absorbtion of seat region

What does it test:

It tests absortion of the energy in the seal/heel region of footwear.

Why is it important? 

Human step constists of various phases, where specific parts of the sole contact the ground with different force. The seat/heal region touches the ground as first and therefore exposes itself to pressure. Therefore energy absorption at this part of shoe is very important for comfortable and healthy wear of footwear.