My specific goal is to lose 10-15 pounds. I have been working out 4-6 times a week with Cathe's cardio tapes and am very happy with the progress. I would like to add weights to my routine. I am wondering if adding tapes like power hour and circuit max is enough. Do I really need to do the more slow and heavy tapes. I already own all of Cathe's tapes, I just prefer to do more fast paced tapes. I would use the weight tapes twice a week in place of cardio. Thanks in advance.