Reference: C Mackintosh, D James, N Davey, R Grenfell, K Zhang. Monitoring Sports and Swimming, US Patent App. 11/843,204
Abstract: A data logger for a swimmer which includes an accelerometer, and a GPS unit to sense position and velocity, a heart rate monitor, a controller programmed to manipulate the data and provide a display of the heart rate, lap times, stroke rate etc. The data can be stored for use by the coach. The device can also be adapted for other sports.