1. A method for identifying a particular movement from accelerometer data by comparing an identified sequence in the accelerometer data to known sequences, the method comprising: storing a plurality of entries in a database on a portable computing device, each entry representing one or more known sequences of accelerometer data that are generated when a particular movement is performed; receiving accelerometer data from one or more accelerometers worn by a user while performing a first movement; accessing the database to determine that the accelerometer data received from the one or more accelerometers includes the one or more known sequences of a first entry; and determining that the first entry is associated with a first particular movement.