Fig. 4. Comparison of different accelerometer mounting positions by simultaneous collection of data from several accelerometer locations. The output for the hoof-mounted accelerometer is always shown in green, and the comparison location in red. The output during locomotion on a hard surface of an accelerometer mounted on the lateral aspect of the third metacarpal bone (MCP) at walk (A) and trot (B), and the output of an accelerometer mounted on the proximal phalanx (prox. phalanx) during walk (C) and trot (D) are shown. The output during soft surface locomotion of an accelerometer mounted on the proximal phalanx during walk (E), trot (F) and canter (G) is also shown. Vertical broken lines indicate the time of foot on (a) and foot off (b). Accelerometer output in volts cannot be converted to m s^–2 due to automatic gain control within the analogue telemetry system used.