I have no idea what that code means but I assume it has something to do with maximum heart rate? The only way to know your actual maximum heart rate is to do a maximum effort test. This value will be activity specific: all else being equal, most people can hit a higher max HR when running than cycling because running recruits more muscles.
But knowing your max HR won't directly tell you the heart rate at which the majority of your power output is generated from anaerobic metabolism. There is only a loose relationship between those numbers, with significant variations between individuals. Again, if you want to actually know your numbers then you'll need to do a metabolic test in a real sports performance lab where they can measure inhaled and exhaled gasses while you pedal a stationary bike, along with data from power meter and HR sensors. Some consumer fitness trackers such as Garmin bike computers can also give you a rough estimate of heart rate zones based on your HRV response curve.
While I can't disagree with any of this... just riding at 80 RPM v 50-60 RPM (what a lot of amateur cyclists do) will make a difference on the legs and knees. You can feel it immediately, even at the exact same power output. There are various studies on it with all kinds of justifications involving oxygen usage and different muscles etc etc, but just try it and it's sort of obvious.
But knowing your max HR won't directly tell you the heart rate at which the majority of your power output is generated from anaerobic metabolism. There is only a loose relationship between those numbers, with significant variations between individuals. Again, if you want to actually know your numbers then you'll need to do a metabolic test in a real sports performance lab where they can measure inhaled and exhaled gasses while you pedal a stationary bike, along with data from power meter and HR sensors. Some consumer fitness trackers such as Garmin bike computers can also give you a rough estimate of heart rate zones based on your HRV response curve.