Sorry BM, maybe I should have given more information in my original post.
My weights routine doesn't take that long as I only train one muscle group (or area) per day - chest, back, shoulders, biceps and triceps. I don't train legs, which probably isn't right, but I have done a lot of running in the past and never really liked training legs with weights.
5 times a week is fine for me cos I have the equipment at home. I also have been doing quite a bit of cardio. I ride my bicycle to work and back every day and usually go for a run or long bike ride on the weekend. I also sometimes train hills on the weekends for power instead of a long run.
Going by what you said, I think it would be fine to do some cardio after I train as I only train upper body. Is this assumption correct?