Strange Heart Rate Readings

Yes, they are very inaccurate.

+1

If you really want to use heart rate for your training, you should use a chest strap.

I’m not really too bothered about using HR but I just wondered why the reading always jumped around the same time on a hard run regardless of distance.

Whereas on a slower run, HR remains constant throughout

Same thing happens to mine in tempo runs. My heart rate will be around 150 for the first 10 minutes and then shoot up to 180, although effort level is the same. I’ve wondered the same thing. Is the heart rate monitor wrong or does my heart rate shoot up naturally because of heat and exertion?

The fact that it happens only during quicker sessions (ie: slower workouts might remain constant at 120bpm) makes me think my Garmin takes a while to catch up and then does it as a jump. As opposed to my heart rate jumping from 150 to 180 bpm in a matter of seconds.

I’m not sure it’s possible for the Heart to increase rate so quickly!

Iloveheartrate wrote:

Is it just inaccuracy on a wrist based HR monitor?

What do you think?

There are two ways to increase cardiac output: 1) increase heart rate (the number of beats per minute), or 2) increase stroke volume (the amount of blood pumped with each beat). As you start to exercise, HR and SV both increase in order to meet the need for increased blood flow. After 10 or 15 minutes of exercise, stroke volume actually starts to fall a bit. Heart rate then has to increase in order to maintain cardiac output at the level necessary for exercise.

Basically stroke volume predominates as the means of increased cardiac output early in exercise, and heart rate predominates later.

All of that is irrelevant, to what is actually going on here; it’s called ‘cadence lock’.

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

google search it.

This is one reason you need a strap. This topic keeps repeatedly popping up on this forum, and it consequently keeps gettin repeated:

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

not a cardiologist wrote:

There are two ways to increase cardiac output: 1) increase heart rate (the number of beats per minute), or 2) increase stroke volume (the amount of blood pumped with each beat). As you start to exercise, HR and SV both increase in order to meet the need for increased blood flow. After 10 or 15 minutes of exercise, stroke volume actually starts to fall a bit. Heart rate then has to increase in order to maintain cardiac output at the level necessary for exercise.

Basically stroke volume predominates as the means of increased cardiac output early in exercise, and heart rate predominates later.

I am not easily impressed, but that is Gold.

again and again wrote:

All of that is irrelevant, to what is actually going on here; it’s called ‘cadence lock’.

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

google search it.

This is one reason you need a strap. This topic keeps repeatedly popping up on this forum, and it consequently keeps gettin repeated:

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

Would you expect the cadence value to equal HR when it locks on? Or could it differ? In my examples, cadence is displaying a difference value to BPM

Hey, I usually use app to check heart rate https://apps.apple.com/us/app/welltory-blood-pressure-pulse/id1074367771 . This is very convenient both for sports, and in general to monitor your health. When I bought my smartwatch, I took a long time to choose between all the existing apps. I needed extensive functionality.

to work properly a wrist based HRM needs to be pretty tight and it helps to have saliva or some other conducting liquid on the back of the HRM. Sometimes I will be tooling along at a very slow pace and notice a stupid high reading like 170. If worried about it I will tighten the strap on my HRM and check that dried salt or something isn't blocking the signal. I think you can tell its messed up if it is a steady red LED instead of blinking green, at least I've noticed that in the past when it is reading off

again and again wrote:

All of that is irrelevant, to what is actually going on here; it’s called ‘cadence lock’.

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

google search it.

This is one reason you need a strap. This topic keeps repeatedly popping up on this forum, and it consequently keeps gettin repeated:

CADENCE LOCK. CADENCE LOCK. CADENCE LOCK.

this is the correct answer