A little background: I am 41, 5'10" and 176 lbs. I have been cycling steadily for 3 years and currently ride a minimum of 150 miles per week. I hate jogging or running, but was talked into a short lunchtime run by a co-worker.
So....
I went for a 2 mile run today (which I admittedly hated for the first mile, but warmed up to the concept during the second), and was wearing my HRM. The highest I was able to go on the bike was 181, but imagine my surprise when after the run my HRM reported 198 Max! About 1/4 mile into it, I checked my HRM to make sure it was working and saw 89, checked again a minute or so later and it was steady between 160-165. I never got uncomfortable and actually felt like I could go another mile or two. We completed this run in 15:37.

The question is...does 198 sound reasonable for a guy with the history above? Did I risk blowing a gasket at that heart rate? Is that kind of a jump in heart rate (89-160 in a minute) normal when running?
Are there a lot of people who hated running then kinda grew into liking it?

Thanks
Bob

You need to see if you can hit that mhr again, could be hrm malfunction.

I'm 54 and about 180 lbs I can tell you I had the same experience when I tried running with the heart monitor for the first time. My max is about 180 bpm and I hit that while running with what I considered a good but not max effort. At 180 bpm on a bike I am about done.

It turns out that because you are supporting your own weight while running your heart rate typically will be higher for a perceived effort

For different sports, you'll have different max heart rates.

Running typically has a higher max HR than cycling, because it's more "load bearing".

Swimming, on the other hand, will typically have a lower max HR than cycling.

Run a different route and try to get the rate up there again. At your age, chances are that the HRM picked up some interference along the way that gave you a false reading.

Okay... same distance todat, different route, same topography, 193 MHR. The only difference was that we didn't sprint at the end...... What does this mean?? Am I gonna blow a gasket??

It probably doesn't mean anything. I'm 51 and mine is 184.

I guess you and I should use the "235 minus your age" formula.

There is only one "Max Heart Rate," and that is the maximum number of beats per minute that your heart will do. Yours is probably somewhere above 200. I have done several different Max HR tests, and have consistently found mine to be right at 200. I do sometimes hit 195 or higher while running, but that is when I am racing at my 5k pace, or speed training at just about maximum effort.

I suggest you do a MHR test (there are several self tests you can do, or you can have it done at a clinic), then you will know a little more about what those other numbers mean.

I have been noticing a trend in my MHR recordings that is odd as well. Last week I hit 205BPM and today I hit 199. I am age 30, 6 foot, 230lbs and have been riding for about two years. I am wondering if this can be correct. I used to be very athletic (before I left the army, went to college, and moved in with my girlfriend) and wonder what my MHR , RHR, and LT were during that time.

Anyway, it is good to hear that I am not the only one with an apparent MHR above the calculated one.