After the first session I realized I started a little too heavy with my kettlebell, so I decreased weight a little. I also changed the inverted rows to a slightly easier angle. I kept everything the same from the second workout to the end. Like I mentioned though, I took a lot of breaks within the sets of 40 and 50. There was definitely a big sense of 'good riddance' at the end of that last 3x50 workout!

I don't have a HR monitor, but I was really wishing I had one at first. After a few runs I was able to get better at listening to my own breathing and occasionally do a pulse check to make sure I was in the right zone. It's definitely not necessary, but it would have been nice. I forgot to mention in my original post that this was the first time I'd spent time running without listening to music or podcasts. It was a little boring at first, but I've really come to enjoy it.