I will later sit down and review the video and go to the 100 ups challenge blog. No running today. Just the 100 up, minor. I can still hear the blood pounding in my ears.
An interesting point about the motion. I usually think about my right leg and left arm (and the other pair, too) as working in unison. As I understand it, with the 100 ups, you are initially focussed on the right knee popping up, thus triggering the the right hand to swing back — there’s a kind of unit in play — a different one than I usually think of. Perhaps that contributes?
Or I’m over thinking it.