I'm on week two of the HP Mass Program and I really haven't found time to squeeze in cardio on the Upper and Lower pressing days. I can incorporate cardio on the two NC and Lats/Bi's workouts because the timing just works better, basically three days a week. However, in thinking about what you said about feeling good after the workout, like you can do more / feel energetic, I'm concerned about how to do cardio. I typically jog or run on a treadmill for 30 minutes but when I'm done I definitely don't feel good, like I could do more if I had to. It's more likely that I feel pretty beat afterwards. What would you recommend for incorporating cardio? Specifically, intensity level and length.