I have just used 3, 5, & 8 pound weights for this first time through the program, and I haven't felt like I've needed heavier weights. As you progress, the moves get harder, so you don't necessarily need higher weight. My recommendation would be to wait until you get to a point where you feel you need a higher weight before you purchase them. When i started the program, I had not been doing any weight training though. You'll have to judge your needs on your own level of fitness.