Well I'm doing 30 mins on a treadmill since its winter up here in the North and runnin outside is downright dangerous. Ha! I started out at 20 mins and have been bumping it up 2 mins everytime until I hit 30 ( which I have). I'm doing 5mph continuously the whole time and was considering starting to bump up the speed now slowly each run or should I keep increasing the time some more?

Dr. X actually said lower intensity cardio 45-60 mins in his "How to Bulk" stickies.

He also said 20-30 mins in the "How to Cut" sticky.

These would seem opposite to me but I don't have nearly the experience. Just trying to gain some valuable knowledge to do things right.