Originally Posted by
Mark E. Hurling
I'm 67 with an RHR in the mid to upper 60's. I use the Karvonen method for computing MHR just because I can do the math in my head easier and the differences at my age aren't all that significant. So the gap between RHR and 60% of MHR for me is 92 (rounded up). Given that a number of "trainers and experts" start LISS at 50%, that gap narrows even further. I go with 60%-70% because it is more commonly cited. As a reference point, my HR will register around 102 for casual walking.
When I ride, I stay off highways and look for windy, twisty, hilly back roads (albeit chip and tar paved - I have a Sportster 48) to bomb around on. I live on the edge of the Shawnee National Forest and there are lots of roads like that. I don't like riding on well traveled roads because I don't trust the all-too-many Chicago drivers down here who attend Southern Illinois University. So while my riding isn't exactly thrill a second motocross, it isn't a smooth steady cruise on an Electra Glide on I-70. Too boring and too many cars and semis.