This document discusses goniometry and range of motion measurements for the knee and ankle. It defines goniometry as the measurement of joint angles and describes the main types of goniometers. It then provides the details on performing knee flexion, knee extension, ankle dorsiflexion, ankle plantarflexion, ankle inversion, and ankle eversion range of motion measurements, including positioning, axis of motion, and reference points. Recommended textbooks on biomechanics and goniometry are also listed.