That sounds interesting! You could see how fast your heart was beating on a run...or perhaps try to slow down the pace a bit if its running too high. That may help especially for long ski days~all day etc?
i did use one for hiking uphill at 11000ft in boots with skis. i wanted to see if i was maxed out. you have to find a place to put it for instant viewing....i put mine thru a strap on the top of a glove.