There are lots of papers about researchers which investigated how does the COP behave in some postures (like unipedal or bipedal standing), and functional activities (like walking) on healthy population. Another activity related to the daily living is going up and down stairs, which of course allow us to get to some point (high or down in a building, for example) in case there is not an elevator or other devices that allow us to get there. Furthermore most of the buildings around us (even our own houses) have stairs on them, so we have to deal with that structure.
There are some studies which have investigated the kinetic and kinematic parameters, angles and other properties related to the stair descent. I´m interested in knowing how the COP parameters (Ap/Ml Displacement, Velocity, and trace length) behaves in this activity