[QUOTE=Catrin;503560]Reading all of these posts on running is very interesting. I've decided that I am just not "built" for it - though that is probably an excuse. I can't jog two laps at the gym without gasping for air at the end and my heart-rate is at 90-95%...yet I can take the most intense spin-cycle class we have (and it is intense) AND spin on my own at equal intensity for an hour before spinning class and it doesn't tax me near as much. Working hard, oh yes, but it isn't too much - and it seems to be paying off in the endurance department - not getting away from spinning entirely, but am down so I can cycle
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Catrin - ditto! I would love to be able to run, but very quickly get my hr up to near max and can't breathe. But I can do a standing sprint on the spin bike for a long time and not feel half as bad as I do running. I'm thinking it's the impact of running??