In reply to kevin stephens:
> A cheap heart rate monitor can make it more useful and interesting, set the effort level to maintain a given heart rate for a given time. There's lots of information on lie on max heart rate, % of max HR training zones etc
I'd second that, although "interesting2 can sometimes be a bit worrisome.
I've recently dug my stuff out and I've noticed my max. heart rate is about 165 ish, from regularly 185 ish only a year ago. I don't really know what that indicates, if anything, but it's quite a big difference. nine years ago I would quite regularly go into the 200+ region, not for very long but it did get there.
Having done no aerobic exercise, or owt else other than climbing indoors for about 12 months, I'm not surprised things have changed, but still!