1. A mobile data capture system comprising: a sensing unit comprising: i) at least one sensor that, in operation, generates sensor data based on detected motion of a user while the sensing unit is attached to one of the user or equipment worn by the user, and ii) at least one camera that, in operation, captures a plurality of images of the user while the at least one sensor generates the sensor data; and processing electronics that, in operation, receive and store the sensor data and data representing the plurality of images of the user, and correlate at least one of the plurality of images to a performance metric, the performance metric based on the sensor data and processed in the processing electronics.