I did another half hour of cardio today and followed that up with a chest/shoulder workout. I did the same lifts as on Friday and tried upping the weight on all three exercises. I went up five pounds on bench, ten pounds on incline and five pounds on seated barbell press and still banged out all reps for the 5x5 routine. It's just amazing to feel like I can do anything I want in the gym - the weights are going up every time I workout and I'm hitting every rep, full range of motion, steady pace and just keep pumping them out.