Fig. 2From: Reliability and validity of a novel Kinect-based software program for measuring posture, balance and side-bendingConvex Hull equation. x1 is the first value of COP displacement in A/P direction and y1 is the first value of COP displacement in M/L direction (x2, y2 is the second value, x3, y3 is the third value and so on)Back to article page