I started the Bill Star 5x5 a couple weeks ago and I feel as though I'm not getting a good enough workout. I am barely sore the next day because the weight is generaly so low until the last set. Is this an effective routine that way? If so can anyone explain why? I used to do mainly heavy lift at 3-7 reps per set with anywhere between 3-5 sets. The next couple days I was very sore and felt like I had a great workout. Just curious if I'm on the right track with this or if I should go back to my old system? Please help anyone!