Point of maximum knee flexion was determined as the lowest point of the movement. Each angle was digitised manually by the same experimenter using the Quintic software package. Positive FPPA values reflected knee valgus, excursion of the knee towards the midline of the body so the knee marker was medial to a line between the ankle and thigh markers. Negative FPPA values reflected knee varus. The average FPPA from 3 trials was used for analysis. Between-session reliability of this method has been established using intraclass correlation coefficients and range from 0.72 to 0.91 (Munro, Herrington, & Carolan, 2012).