Originally Posted by
pakossa
Didn't have time to go through all the posts, and not sure this is totally on-topic, but: Haven't used a HRM for quite a while, but when I did, my HR almost always "drifted" DOWNWARD as a ride progressed, even on recovery rides. Any ideas why?
While maintaining same power by PM? For me, that's always low blood sugar, though I only see that on long, strenuous rides.