Check out this feature about Instabeat in http://guydster.com!
If you swim competitively or even just for exercise, then keep reading. If you don’t swim, you should start and also keep reading. Swimming is a great full body workout and it won’t destroy your joints like jogging will, but different intensities in the water will lead to different benefits. Instabeat is a head mounted display that fits on any swimming goggles and reads your heart rate as you swim. Since maintaining different heart rates during a workout achieve different results, Instabeat will inform you which zone you are in, in real time, with a color coded system of blinking lights. Blue is for fat-burning, green is for improving fitness/stamina and red is for increasing your maximum performance. The unit also records calories burned, laps swam, and breathing patterns for post workout analysis. Pre-order yours for $149 at instabeat.me