The Polar watch company feature a collection of sports watches that are tailored specifically to runners and multisport events like triathlon. That is, they are designed with features that will help runners track and analyse common aerobic workout activities and performances as well as serving as a basic fitness implement.

The Polar RS100 is the most basic of these and delivers a basic heart rate monitor without a bunch of fancy and confusing features - not to mention costly. In essence this watch is ideal if you want something to get you started down the part of running at a more serious level, or if you are already at a serious level and don't yet have a heart rate monitor watch.

Polars "Running Watch" series comprises of the following models:

• RS100
• RS200
• RS300X
• RS400
• RS800CX

The Polar RS100 heart rate watch provides the wearer with basic heart rate monitoring including target heart rate zones. Polar's OwnZone feature automatically calculates your training zone intensity, based on your personal information. The beauty of the Polar RS100 Heart Rate Monitor watch over other heart rate watches is that it is friendly and convenient to use in practice.

The watch features three display lines that includes one user-configurable data line (top-most line), as well as a large push-button on the front of the watch that ensures you will not be fumbling for the right button when you're hot and sweating. The watch face is large and clear and there is a backlight provided for night-time running.

The Polar RS100 Running Computer Heart Rate Watch features digital transmission of heart rate data between the chest strap and wrist watch. This ensures you will not suffer interference with other electronic devices. The watch measures calories too, making it useful if you are trying to use weight as well as train for a competitive endurance event like a fun run or marathon.

The RS100 Polar stores 99 lap splits in the stopwatch memory allowing you to record your individual repetitions. Heart rate data for individual laps is recorded as well as for the entire session. This watch only has enough memory for a single session as you'd expect in an entry-level watch. If you require more than than this, it is provided in higher-end models like the Polar RS200 and Polar RS300X (both can store up to 16 training files). Of course the Polar RS400 and Polar RS800CX can store a lot more, but these cost a lot more too.

In summary the Polar RS100 Heart Rate Monitor Watch is a basic heart rate monitoring watch that offers you the benefit of the fact that it is a Polar, Polar having a reputation for delivering higher quality heart rate monitoring watches. Runners who seek to enter the realm of heart monitoring, but do not need a bunch of complex features could do a lot worse than the RS100 Polar watch.