If you want to keep an eye on your heart rate, then the Polar GPS Heart Rate Monitor will certainly help you out. This device give you your heart rate even in water with the hybrid transmitter.
The ZoneOptimizer feature coaches you to train at the right intensity while Sport profiles give you a swift switch between different sports. Just those features alone make this one a truly useful monitor. You also get a G5 GPS sensor and CS cadence sensor W.I.N.D for cycling speed, distance and cadence measurement.
It is lightweight and there’s no need to charge it up. This is a stylish way to get all of the info you want. It will cost you $387. from Amazon.