I'm glad you stopped browsing the political forums and came here for awhile. We're your friends. Not like the others......
Anyway, I'm reading through "Younger Next Year" and have gotten to the point where the authors extole the virture of HRM's.
I used a HRM years ago when I got into jogging. What I found was that I invariably jacked my heart rate up at much slower jogging speeds than I would have thought. The result was that I jogged very, very slowly. That was probably good. It kept me from hurting myself, at least until I was doing 14-16 mile training runs and trashing my plantar fascii.
I found the HRM useless for MTBing. After the first big climb I would peg out. If I paid strict attention to the monitor, I would have had to pedal in little tiny circles at the bottom of a hill and just stay there until I dismounted and pushed the bike up.
When I spin on the trainer, I find that the HRM confirms that when I feel like blowing chow I'm in the 90%+ zone.
In other words, I find my perceived effort as useful when I'm spinning out as a HRM.
So, I know that many of you use the HRM to keep from redlining. That makes sense but I have no medical reason to back off. When I feel like blowing I back off.
Do any of you need to use a HRM to increase the intensity of your activity? Again, for MTBing it doesn't make sense, as if you're on the trail you know you gotta put out the effort. When I road ride I'm calibrated to do 12-13.5 MPH. I almost always end up with a sweat, especially with the hill climbs.
So why should I bother with a HRM?