I know Jan is famous for this bad cardio, but I think he improved it. First it seems to me like he was quite nervous in the first minutes, which depletes your cardio fast. But if you look at his significant strikes: 97 out of 191 landed. That's crazy high, even for lighter devision. I looked at the last 5 events and only 3 fighters landed more than 97 significant strikes and these fighters were fighting at 115, 135 and 145 pounds.