Hi everyone, I am trying to do each slow and heavy tape twice a week, but due to their length plus the fact that I also need my cardio, I am having an extremely difficult time squeezing them in. I know that Cathe says at the beginning of each tape to do it once and not more than twice per week. I do want to gain strength from this series. Does anyone know if using them just once a week is really enough to do that or would it only maintain whatever muscle I have now. Thanks so much. Mary