HOLY SHIT!!! This is going to make or break me! It was unbelievably difficult. I haven't ran in almost 4 months since the bulking cycle and even before that. Now I'm weighing 30 pounds more than I did the last time I ran I can really feel the extra weight when on the track. Anyway I ran a five minute warm-up at a jogging pace 50-60% of max, then did two 1 minute intervals of 30 seconds 90-95% sprinting, and 30 seconds of 50-60% jogging. Only 7 total minutes had elapsed and I felt like my lungs were going to explode. It was very difficult to regain normal breathing, I almost felt like I was about to panic due to the trouble my body had in breathing and catching breath. The legs got a pretty massive pump as well, and that felt good. I sure can't wait until thursday, that's my next HIIT session.