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If you have done some hard training in recent weeks and know that you can safely reach maximum heart rate, you can safely take a test to determine your HRmax yourself. Having a training buddy with you during the test is recommended. If you are uncertain, consult your physician before undertaking the test.

Here is an example of a simple test.

Step 1: Warm up for 15 minutes on a flat surface, building up to your usual training pace.

Step 2: Choose a hill or stairwell that will take more than 2 minutes to climb. Run up the hill/steps once, building to as hard a pace as you can hold for 20 minutes. Return to the base of the hill/steps.

Step 3: Run up the hill/steps again, building towards a pace you could just about hold for 3 kilometers. Note your highest heart rate. Your maximum is approximately 10 beats higher than the noted value.

Step 4: Run back down the hill, allowing your heart rate to drop 30-40 beats per minute.

Step 5: Run up the hill/steps once again at a pace that you can only hold for 1 minute. Try to run halfway up the hills/steps. Note your highest heart rate. This brings you close to your maximum heart rate. Use this value as your maximum heart rate to set training zones.

Step 6: Make sure you get a good cool-down, a minimum of 10 minutes.

Heart Rate Value in a Sitting Position

HRsit is your average heart rate when completely still (i.e. while sitting). To easily determine HR sit, wear your heart rate sensor, sit down, and do not engage in any physical activity. For a more precise measurement, repeat the procedure several times and calculate your average.

Heart Rate Reserve

Heart rate reserve (HRR) is the difference between maximum heart rate (HRmax), and resting heart rate (HRrest)*. HRR is used to calculate exercise heart rates. It is the range within which heart rate varies depending on exertion level. HRR equals oxygen uptake reserve (VO2R).

Exercise heart rate can be determined by using the Karvonen formula**. Add the given percentage of heart rate reserve to resting heart rate.

Exercise HR = % of target intensity (HRmax – HRrest) + HRrest

Example:

Target intensity 70 % HRR for a person with HR max 201 bpm and HRrest 50 bpm

Exercise HR= 70% (201-50) + 50

Exercise HR=156 bpm

For a precise exercise heart rate, you need your exact HRmax and HRrest. When using estimated HRmax, exercise heart rate values are always estimates.

*In Polar RS800CX training computer, the heart rate value during a resting state is measured in a sitting position (HRsit). This is for practical reasons since HRsit is used in energy expenditure calculation because of accuracy. HRsit matches the low intensity to which different exercise intensities can be compared.

**Karvonen M, Kentala K, Mustala O. The effects of training on heart rate: a longitudinal study. Ann Med

Exp Biol Fenn 1957; 35: 307-315.

Heart Rate Variability

Heart rate varies with every heartbeat. Heart rate variability (HRV) is the variation of beat to beat intervals, also known as R-R intervals.

Background Information

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Polar RS800CX user manual Heart Rate Value in a Sitting Position, Heart Rate Reserve, Heart Rate Variability
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RS800CX specifications

The Polar RS800CX is a high-performance heart rate monitor designed for serious athletes and fitness enthusiasts who demand accurate training data and advanced features. With its sleek design and user-friendly interface, this device is built to enhance your training experience.

One of the standout features of the RS800CX is its precision heart rate monitoring. The device utilizes Polar's WearLink® transmitter, which consistently delivers reliable heart rate data, allowing users to train in their optimal heart rate zones. The heart rate monitor is compatible with various chest straps, which ensure a secure fit and accurate readings during intense workouts.

The RS800CX comes equipped with Polar’s advanced training features, including Training Load, which helps users understand the effect of their workouts on their bodies. This feature allows athletes to gauge whether their training is improving performance or leading to overtraining, ensuring smart recovery strategies are implemented. Additionally, the Smart Coaching feature offers insights into training intensity, enabling users to optimize their sessions for maximum efficiency.

Another notable characteristic is the RS800CX’s ability to track speed, distance, and altitude, making it an excellent companion for outdoor activities such as running, cycling, and skiing. With its GPS functionality, users can map their routes and analyze their performance post-activity. The device is engineered to measure various metrics, including cadence and power, which contribute to a comprehensive understanding of athletic performance.

The RS800CX also features a customizable display that allows users to choose which metrics they want to see during their workouts. The clear and easy-to-read screen ensures that critical information is readily accessible, even during the most demanding training sessions.

For those looking to analyze their performance further, the RS800CX is compatible with Polar's software and online training platform. This functionality allows users to upload their data, track progress over time, and set personalized goals. With performance tests available through the platform, athletes can measure their fitness levels and make informed adjustments to their training plans.

Ultimately, the Polar RS800CX is a cutting-edge training tool that combines advanced monitoring technologies with user-friendly features, making it an ideal choice for those serious about achieving their fitness goals. Whether you’re preparing for a race, improving your overall health, or simply looking to enhance your training routine, the RS800CX offers the insights and data necessary to elevate your performance.
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