What actually is a heart rate monitor?

Heart rate monitors have one job; they record your heart rate. They are not a new invention, but technology has advanced over time. You don’t have to lug around a bulky chest strap that emits annoying beeps when you run. Fortunately, the technology you need can now be packed into a compact strap that you can wear around your chest. Heart rate monitors have become more popular in recent years, especially in the fitness community, as they make it easy for anyone to record their heart rate.

How do they work?

Believe it or not, heart rate monitors don’t randomly generate numbers, they actually measure your heartbeat. With each heartbeat, an electrical signal is sent through your heart muscles, triggering a contraction. This electrical signal can be measured through the skin, so your chest strap must also be in direct contact with your skin. In science this is called electrocardiography, the recording of the electrical activity of the heart.

This electrical signal is recorded by the electrodes in your heart rate monitor and is amplified so that it is easier to measure. Most heart rate monitors also contain a microprocessor that continuously measures and calculates the heart rate. This signal is then transmitted wirelessly, usually via Bluetooth 4.0, radio waves or ANT Heart Rate Monitor +, to the receiver. Therefore, you need a transmitter or HRM sensor and a receiver to measure the heart rate – the chest strap is the transmitter, your iphone with the Welltory app is the receiver that interprets and displays the data; an App to check heart rate.

If you have problems measuring your heart rate, we have the following tips for you:

  • Moisten the sensors on the chest strap with a bit of water or EKG gel for a good connection (sweat usually does this once you have started your activity)
  • Stay away from strong magnetic fields as they can interfere with the signal
  • Chest hair can interfere with a proper measurement
  • Move the belt up, down, left or right a little if it doesn’t work
  • Make sure the chest strap is tight enough and that the electrodes don’t move during activity
  • Old batteries can lead to inaccurate measurements

What are the benefits of training?

Samsung heart rate monitors or any other heart rate monitor devices are very important for your training because heart rate is a reliable parameter for how hard you are training. Your heart rate tells you whether you are training too hard and overdoing it or whether you should try harder. If your heart rate is abnormally high, e.g. For example, during a slow recovery run, you should take a few days off. Knowing your heart rate can also motivate you – especially when you realize that your usual pace is way below your actual abilities.

When you run with an accurate heart rate monitors, you are likely aiming to run in a specific “zone” or to exercise at a percentage of your maximum heart rate. Leave your calculator plugged in, we’ve done the math for you when it comes to training in certain heart rate zones. Log into Runtastic.com, click on “More” in the navigation bar, then on “Body” and then select the menu item “Heart rate measurement”. Then you will see the different heart rate zones or pulse zones with values ​​adjusted for you below (the zones are calculated based on your age, resting pulse and your maximum heart rate).

The zones in detail *:


Suitable zone for beginners or those returning to work after a break from training, increases your fitness level and increases fat burning.

Fat Burning

The ideal zone to improve your endurance. Exercising in this area improves the supply of energy to the muscles over a long period of time. Your heart will be strengthened and most of the energy will be obtained from stored body fat.


In this zone you can strengthen your cardiovascular system and muscles and burn fat at the same time.


If you want to increase your anaerobic threshold, you should train in this area. The anaerobic threshold is the point at which the body can no longer break down lactate in the muscles quickly enough.

Red area

Only professional athletes should train in this area. You can improve your speed here, but be careful, you should only train in short intervals and never stay in the red zone for long.

* If you feel that the numbers are incorrect, you can edit them manually in your Welltory app> Settings> Heart rate> Heart rate zones.

Most of the workouts you will do in the beginner, fat burning, or aerobic zones; The anaerobic zone is where you are most likely to move when doing interval workouts.

If you use a heart rate monitor with the Welltory app, your heart rate (HR) will be recorded throughout the activity. In addition, if you wish, your language coach will inform you of your average HR in this section after every kilometer (or after every mile). After finishing the activity, you can analyze the development of your heart rate (as well as your pace) in a clear graphic and get information about the average HR per segment and during the entire workout.

In the summary of your activity you will find a separate screen for heart rate on the far right, where your HR measurement is displayed in a pie chart, which shows the percentage of how long you have been moving in a certain heart rate zone. You can also read off your average and maximum HR. You can also find your heart rate statistics on Runtastic.com in the form of a pie chart including distance or time information for each HR zone.

As soon as you get fitter, these values ​​change as your heart gets bigger and works more efficiently!

So now you know how a heart rate monitor works and how it can improve your training. Tell us in the comments whether the heart rate measurement also had a positive effect on your training! We look forward to your feedback or suggestions as a comment, but we ask for your understanding that we cannot answer any support queries here. In this case, please contact Welltory Help Center. Many Thanks!