Q: What is MHR and how does Myzone measure it?
Your Max Heart Rate (MHR) should be viewed as the upper limit of what your cardiovascular system can handle during physical activity.
Myzone uses a formula derived by the HUNT Fitness Study to automatically establish your age predictive MAX HR:
211 - [0.64 x your age]
When you enter your age during the registration process, Myzone automatically calculates your age-predicted MHR. It’s important for you to have a MHR value in the Myzone system, as Myzone uses it to determine your heart rate zones while working out.
Q: Will my MHR change over time?
Yes, your MHR will reduce as you get older. It will not change aside from this although your ability to maintain a higher heart rate will increase with training.
Q: When will the Myzone system adjust my MHR?
When you exceed your current MHR for 30 seconds or longer. You will receive an email from Myzone indicating the change as well.
Q: How does MHR relate to the Myzone Zones?
The Myzone zones (GRAY, BLUE, GREEN, YELLOW, & RED) are directly tied to your estimated MHR in the Myzone system. Here’s a breakdown:
- GRAY Zone: 50-59% of MHR
- BLUE Zone: 60-69% of MHR
- GREEN Zone: 70-79% of MHR
- YELLOW Zone: 80-89% of MHR
- RED Zone: 90-100% of MHR
Q: What are some factors that affect MHR?
- Age: our MHR tends to decrease as we grow older.
- Altitude: Acute exposure to high altitudes may cause a temporary decrease in our MHR. We will also have a higher heart rate during submaximal exercise at a high altitude. With continued exposure to high altitude, our MHR should increase and our heart rate during submaximal exercise should decrease compared to when we were first exposed to high altitude.
- Mode of exercise: The MHR we can achieve during different exercise modalities does vary to some extent. For example, exercisers tend to achieve a higher MHR when running compared to cycling due to more muscle mass utilized in running. Exercises like swimming and upper-body Kranking may also elicit a lower MHR due to the smaller muscle mass of the upper body. We recommend that you set your MHR value to be appropriate for the modality of exercise you perform most often.
- Medications: Some medications will limit the MHR you can and should achieve during exercise. An example is beta-blockers, which decrease your MHR lower than the age-predicted maximum used by Myzone. Be sure to ask your doctor if any of your medications will impact your MHR.
Q: How can I check if my estimated MHR is correct?
If your Rate of Perceived Exertion (RPE) indicates low-to-moderate intensity exercise but your zone indicates high-intensity exercise, you need to raise your MHR.
- Ex: you feel like you are working at a 6 but you are in the YELLOW zone.
If your RPE indicates high-intensity exercise but your zone indicates low-to-moderate intensity exercise, you need to lower your MHR.
- Ex: you feel like you are working at an 8 but you are in the BLUE zone.
Q: How do I adjust my MHR in the Myzone system?
If you feel like your MHR is incorrect, we recommend getting in contact with club staff or submitting a ticket to Myzone Technical support to discuss further.
Remember, the Myzone system will automatically update your MHR if you are able to exceed your current MHR for 30 seconds or longer.