This document discusses optimal sensor placement for gait analysis. It describes analyzing both gait kinematics and kinetics using sensors like accelerometers and gyroscopes placed on the hip, feet, and other joints. The document evaluates sensor placements and finds that a single sensor on the hip provides 92% accuracy for gait analysis, while using sensors on the chest, wrist and hip provides the best performance at capturing full-body movement with 92% accuracy. It also determines that two optimally placed sensors are sufficient to accurately analyze gait using machine learning algorithms like SVM.