Editorial Product Review:Amazon.com Item Description:Stay within your ideal training and intensity range while jogging or working out with the Polar A4 pulse monitor watch. The strapless watch is easy to use: just press and hold the silver contact button with your fingertips and you're set.

Just press and hold the silver contact button with your fingertips for your heart rate with the A4. |
Knowing your heart rate not only helps you reach your personal fitness goal, but also improves your physical condition in general, as it's vitally important to train at the appropriate intensity level. If you exercise too hard, you may quit before you reach the real benefit, but if you work out too leisurely, you'll struggle to lose weight at all. The A4 helps overcome these problems by encouraging you to map out a complete fitness routine.
By itself, the A4 makes a good training aid, but it's particularly valuable when paired with any Polar transmitter, as the two together offer continuous heart rate monitoring. As a result, you'll know what your heart rate is throughout your workout, rather than only when you press the button. Plus, the A4 offers all the standard sports watch functions, including an alarm, calendar, stopwatch, backlight, and target zone alarms. The watch also offers a calorie counting function and exercise file record when combined with a chest strap transmitter (not included). Finally, the watch comes with a zippered black nylon carrying case for protection.
About Polar The first EKG accurate wireless heart rate monitor was invented by Polar back in 1977 as a training tool for the Finnish National Cross Country Ski Team. The concept of 'intensity training' by heart rate swept the athletic world in the eighties. By the 1990s, individuals were looking to heart rate monitors not only for performance training needs, but also for achieving everyday fitness goals. Today, the same concept of heart rate training is being used by world-class athletes as well as everyday people trying to lose weight. Polar is the leading brand among consumers, coaches, and personal trainers worldwide and the company is committed to not only producing the best products, but also being the leading educator on the benefits of heart rate based exercise.
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Buyer Reviews
Average Buyer Rating:

Customer Rating: 
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Polar A4 heart rate monitor watch
This watch works great as long as you wear the heart rate transmitter band. I do not think any of them work very well by the method of pressing with the finger. The watch has different options. You can be excercing and see your heart rate or the percentage of your target heart rate. I use it with the percentage and try to keep it between 70 and 75 percent. It beeps each ten minutes you are in the target zone. I already owned the chest strap for use on a rowing machine. The watch allows me to walk and keep up with my heart rate. It has several other features that I have not put to use yet - but might be useful to others.
Customer Rating: 
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Polar heart rate monitor
I wanted an inexpensive monitor to measure my heart rate while exercising and this unit works well. Combined with the Polar transmitter on the chest belt I easily maintain my heart rate at the desired level.
Customer Rating: 
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For its category, it works well and is a good value.
I already had a chest strap so how I use it is different than those that want the instant HR check. It takes a little time to get used to the buttons and I only learned enough to be able to record my time and ave HR, but it has been working well. The beeps for out of the HR zone are helpful and are loud enough to be heard without being annoying. It is inexpensive for a HR monitor and has worked well, so I consider it a good value.
Customer Rating: 
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not worth $5
The watch does tell time, but that is not why I purchased it. When I run, it does not tell my heart rate. I fact it is the watch that made my heart rate go up. I will never purchase another Polar product.