Wearable technology incorporating multi-axis accelerometry or inertial motion units (IMU) are common place in a broad range of health and fitness tracking applications. Various commercially available wearable and bar mounted accelerometer devices have been validated to measure and track velocity in real time across a range of exercises. Due to their simpler construction and smaller size compared to positional transducers, these units have had a somewhat wider adoption in the fitness world outside elite sport due to portability, convenience and cost. While they have been found to be reliable and valid, some inconsistency at slow movement speeds along with interference from bar vibration at high speeds can be problematic.