Yah. I typically try to keep my HR to below 160 (161 is my 'calculated' limit but my cardiologist ran me up well north of that on the treadmill a few years ago...he said, "Mr. Smith, you are FAT. Your heart is not your limiting factor, your
weight is." (I paid no attention to him then...) I get to see him again next year and I doubt he believes what he sees from the scales!
I do understand the mental bit...and I do use such stuff on myself. I'm just hitting my limit too early yet. I can tell when I've run out of oxygen and I'm not ready to push those boundaries just yet. Give me another 6 months or so and I'll feel much more comfy at the upper limits. 50 yrds, I could push thru...200yds is too much for now.
I'm running the standard Rotor Q-rings at the moment...and I don't feel I've even touched a 10th of what they can do (or what I can do with them?). Again, simply not enough time on them. I've got less than 200mi on the whole bike, hardly got the feel of it yet. I'm not ready to give up on the std. Q-rings...yet. Heck, for all I know I may have them clocked wrong for me and my current abilities.
Of course, now I've got a goal: Make it over that #*$&ing hill. Both directions. One day, I'll do it one way and then turn around at the bottom and do it the other...just going to take some work on my part to get there.
Oh yeah, and I'll probably be hitting that hill every Saturday I can. It is an Army base, and the hospital is just over the crest of the hill. If I blow a gasket, at least I'm not far from help!