Sensors can be used to monitor repeated performances of a biomechanical activity. Data from the sensors are used to determine, for each performance of the biomechanical activity, values or measurements of parameters that quantify various aspects of the biomechanical activity. A consistency metric, which represents biomechanical similarity of the multiple performances of the biomechanical activity, is obtained from the parameter values that were derived from the sensor data. The consistency metric may be used to provide a quantitative assessment of consistency of performance of the biomechanical activity. This can be useful in athletic training as well as in physical therapy and rehabilitation.
