Whether you?re a serious exerciser, or just somebody who wants to get the most out of their training, I suggest that you look no further than the Polar S-Series. The line of the most advanced Heart Rate Monitors from the world?s leading Heart Monitor Company, the Polar S-Series is the ?crème de la crème? of exercising.

What the Polar S-Series watches have in common

All Polar S-Series Heart Monitors offer the same accurate Heart Rate technology, and are all compatible with Polar?s new soft and comfortable chest strap, the Polar Wearlink Transmitter. The constituents of the Polar S-Series provide the same basic Heart Rate functions ? target zones, average heart rate of total exercise, and heart rate as percentage of maximum beats per minute. Common to the Polar S-Series watches is also their ability to upload information from Polar software to the Heart Rate Monitor.

How they differ

While they are similar in some functions, each watch in the Polar S-Series is unique in its function and therefore who it best suits. For more information on which S-Series watch is best for you, please take a look at our Polar Comparison Chart. Cyclists should consider the Polar s720i and the Polar s520. If you?re not concerned with storing more than one workout on your watch at a time, the Polar s150 or the Polar s120 may be for you. Alternatively, the s610 is a good idea for those of you who want to store the maximum number of workout files on their Heart Monitor.

Our Recommendation

If you?re looking for an all round Heart Rate Monitor, we suggest the Polar s625x. Our best selling watch in the Polar S-Series, it is the only Polar watch that comes with an inertial Foot POD, which measures running speed and distance using your specific foot stride. It is also compatible with biking Speed and Cadence sensors. Polar?s newest S-Series Heart Monitor, the s625x is a ?best of? of the other S-Series Heart Monitors. If you know you want a top-of-the-line Heart Monitor, but aren?t sure which features you want, play it safe and go for the Polar s625x.