If one has mild high blood pressure as I do...and take a few meds for it...how can you properly do maximum heart rate intervals if you meds don't allow your heart to speed up? I guess I should talk to my MD more about this. Maybe I should just try cadence methods instead. I don't think I can get my heart rate past 130 beats or so. Does anyone else have an issue with this type of thing, and what can we do about it?