Polar M21

Pros: great design, accurate monitoring, watch features
Cons: some complex functions, need to go to service center for battery replacement

I have been working out regularly since the age 15. However it is only after I joined the medical school, I realized the importance of Target Heart Rate in exercise training. After I started applying the correct technique during my work out, shedding ...

Pros: EKG accurate, records calories burned, backlight, etc!
Cons: Buttons can be complicated

I work out at least 4 times a week. I am not a trained athlete by any means but do enjoy working up a good sweat & knowing that I’m doing a good thing for my body, heart and mind. I didn’t always have such a positive attitude about exercise, but over...

Pros: Provides training programs, can program two profiles for use by two people
Cons: position of mode buttons are awkward

The Polar M52 heart rate monitor is an excellent tool for the athlete and also for those of us just trying to achieve cardiovascular fitness. It is lightweight and comfortable as well as easy to incorporate into your training session. The design is...

Pros: automatically sets optimal rate range each time
Cons: none

I work out five-plus days each week, and have run several marathons including Big Sur, San Francisco and Napa Valley. I used to think that my most important training equipment was my shoes, until I purchased a Polar M52 Heart Rate Monitor a little over a...

Pros: OwnZone, OwnIndex, Slick Styling,
Cons: Battery Has To Be Changed By Manufacturer, Doesn't Track Time Spent Above or Below Target Zone, No Lap Timer on Stopwatch, No Interval Timer

For this review, I thought that I would try a slightly different tack; instead of writing about why I love something, I'm going to write about why I THINK I love something, and then update my review over the next 12 weeks so that in the end, we'll either...

Pros: Everything you could want other than cadence.
Cons: Have to hold to chest for too long for light.

I had heart surgery this past year for a non-recurring condition - WPW.. it's fixed forever. I was still a bit concerned about what my heart was doing and making sure I didn't over do it. I hadn't exercised in nearly a year. I jogged for about a month...

Pros: Helps you know when to push
Cons: "Own.." features do not work for me, Polar S210 better value

I really wished that I liked this model more.

The deciding factor for me in first choosing between the Polar M52 and Polar S210 was the M52’s “Ownzone” feature. The feature is supposed to determine your optimal workout range based on...

Pros: Excellent tool for monitoring your exercise
Cons: Factory servicing of battery and transmitter adds to cost

I bought the M52 because I wanted to be more scientific about getting fit. I wanted a way to put a number to how hard I was exercising and to make sure I was exercising efficiently. The OwnIndex feature (which estimates how fit you are) was also...

Pros: Stopwatch, automatic zone calculation, calories burned estimation, storage of exercise results, tracks average heart rate in a session
Cons: Oversensitive to electro-magnetic interference, doesn't track highest heart rate achieved, only one target zone

I have one of the original Polar Pacer heart rate monitors. I've owned it for 5 years. It's been like a old Volvo to me--nothing fancy but solid as a rock and as reliable as Old Faithful. I started a new cardio workout program recently in which I do...

Pros: Very Accurate Heart Rate, Tracks Previous Stats, Easy to Use, Target Zone w/ Alarm
Cons: Can't Download Stats to Computer (but available in higher end models)

I recently acquired my Polar M21 Heart Rate Monitor (HRM) and must say that I am quite happy with the performance. Unlike the other reviewer to date (whose opinion I highly recommend), I am quite satisfied with the purchase.

The reason I...

Pros: Excellent fitness tool, easy to use, can be used by runners/athletes of all abilities.
Cons: wrist strap on watch a little small, factory servicing for battery replacement.

This is the single best investment in fitness I have made. It made a more significant impact on my fitness and quality of life than any gym membership, mountain bike, or nutritional supplement.

Though I was an athlete all through school, I was...

Pros: Easy to use, compatible with some cardio training equipment, stores workout results
Cons: Can't adjust volume of out-of-range alarm

I recently purchased the Polar M21 from targetzone.com and have worked out with it for 2 weeks. I'm ...

Pros: Easy to use, accurate and durable
Cons: None noted

Having used a Polar M21 for over 3 years, let me assure you that this is a valuable training tool built to take as much as you can dish out. As a Spinning indoor cycling program instructor, my M21 has been through years of classes as well as runs,...

Pros: Allows you to enter your sex and weight for calories burned
Cons: Not a one!

I have purchased the Polar M52 heart monitor one week ago as an early Christmas gift to myself. Boy, am I glad I did. The Polar M52 is an exercise tool that has given me that push I have been looking for to loose my last ten pounds. Since I am at a...

Pros: The best way to train for a marathon
Cons: it is expensive

The Polar M52 is one of the expensive heart rate monitor. In Germany you have to pay 299,- German Marks( 150 Dollar).

This price will frighten a lot people to buy this product. But this price also say's for whom this Polar M52 is good. For...