Wow, I wonder if that muscle imbalance is harder on some women, because of hip width. Plus are you talking one leg or both?

I did leg presses/extensions etc... last month and the first thing I realized is that my "tilted" pelvis is becoming worse, making it necessary to shim an extra insole in to one of my shoes. I had not realized how pronounced the difference of my effective leg length was - until I tried these machines with some excessive resistance.