Yasso 3.0

I created a shorter, more precise version of my original Yasso video and entitled it Yasso 2.0. However I am most grateful to an observant viewer for spotting a small, but significant error. So Yasso 3.0!
Used as a gauge to a potential marathon time, I prefer just a couple of minutes rest between sets, rather than a longer rest more in line with the effort period.
Train well.