Wow, good point.
Yes, that has changed for me dramatially. I was a little skeptical when I first use the heart rate monitor - although it was invaluable for doing the HOUR. Then I wished I had a way to record it and analyze later. Certainly in practice, doing jump the gap or lap the field - I can see how long it takes to recover - and how the harder and more often I jump - the longer recovery takes. And if I haven't gotten below my HR threshold, I'm certainly not going to be able to take a second jump.