Hi everyone! Thank you for all this feedback and YES.....most likely every woman will have to modify spring tension! Andy is very strong and as you see, didn't need to change anything. For most of us, we will have to adjust.....so please, take care of yourselves here. I wanted to give a class showing a man and how much they can handle....sometimes I think women go too easy with them so this class was to show how we can keep it strong and push them to use their bodies with more vigor and strength. Andy is an athlete, weights about 175/180 lbs, that may help you when working with some of your male clients.