Tweet5 days a week, huh? bodypart split?
do your cardio on a treadmill at a high incline at a very fast walk, borderline jog. but not a jog. usually about 3 to 3.5mph is good enough. do that 4-6 times per week (preferrably on an empty stomach in the morning upon waking) for about 3-4 weeks and report back. also, no carbs AT ALL 3-5 hours before going to bed. make sure stress levels aren't out of whack, you're sleeping well, and not overtraining.