Today was HARD!!! I don’t remember Plyo X on P90X being this hard. My heart rate monitor says my max heart rate was 203! I don’t believe it though. It felt like it was in the mid 170’s. And I had visually seen it there too. My average heart rate was 156, which is saying something. I burned a total of 610 calories in 40 minutes. Man… I’m not used to having to take breaks. And I took several during this workout. I’m anxious to see if I fare better when I have to do it again later in the week.