interesting stuff... im going to give it a try (seperate days for cardio and weight lifting)... only issue is that, while in school im only really getting into the gym 3-4 days per week... and i much prefer lifting weights than cardio!
so, i may only do cardio once or twice per week. hmm
-A DUB
not necessarily..just dont do the cardio after weights. you can do cardio in the morning and weights in the evening. you dont have to go to the gym to do cardio. further what training goals do you have?. you have to look at the big picture. if its gaining muscle mass i would be careful with doing too much cardio..specially high intensity such as running and just stick with fast walking.
look its not that complicated: you workout with weights
3-4 days a week then you do cardio a few times per week. if you wanna loose weight you make sure your in a caloric deficit..if you wanna gain weight you make sure your in a caloric surplus.