How to you setup you max heart rate for cycling ?

Did you use a chest strap when on the bike? I'm no expert but I think you should get much higher then 150bpm on the bike... (my bike vs run max is about 7 beats)

Yes, i have chest strap. How you measure max HR on bike is there a good protocol ? or just do i do something like gradual ramp-up until failure? 

Well another FTP test would get you up there I guess :-)

But sounds like your stamina is far superior from your leg muscles used for biking, but as I said, I'm far from an expert...

Also maybe disable OHR before next attempt, to be sure it uses the strap, because to me it sounds to big of a difference

ok, I'll try that in 2 days : )

As a new cyclist... yes HR vs effort... totally different from running.  Legs just don't have the power to keep power up, and only using a few muscles so doesn't stress heart as much (i was once in the same boat).  As you bike more your legs will get better.... allowing higher effort/power/HR.  Elite/pro cyclists can get HR up much closer to their running HR (or the same?)

BUT... to your point, yes, every sport has a different threshold HR and 'max HR'...  typically it is ~10bpm lower as a starting point.  Swimming for example is EVEN lower!

If you are rested, it will be much easier for your legs to put out the power needed to get HR up as well.  That burn that limits you... comes on way quicker if already fatigued.

Piotr said:

Is lactate threshold different for running that cycling

Yes, it is. There is no correlation between LTHR for running and LTHR for cycling. In theory, you should test for each activity. 

https://pubmed.ncbi.nlm.nih.gov/12740734/

Although there is a debate about why, most explanations involve difference in weight bearing and muscle mass involved.

For many, LTHR for running will be higher than LTHR for cycling, which will be higher than swimming. The same observations would be for Max HR.

Now, it looks like the Max HR detection during running can change your Cycling Max HR. So the watch behaves like Max HR detection is independent of the activity (which is not the case from testing).

Piotr said:

Can i measure Lactate Threshold on bike ?

You would need an Edge cycling computer to get a LTHR. In my experience, the LTHR from my Edge has the same value as the LTHR from my Epix2 (running).

For trained athletes and competitions, custom lab testing, training approaches and optimizations like custom HR and power zones are common. This is why coaches make big bucks.

I personally don't think there is enough value for the week-end warrior and amateur racer.

Using the same LTHR and Max HR for running as for cycling will give you good enough training metrics and targets.