Often when someone has issues with their lower back, their adductor muscles or inner thigh muscles are tight and compromising their legs. Knees that tend to move inwards are likely to be affected by overly tight adductors too so rolling these suckers out is the way to go. You can do this one from the lowest part of your thigh next to your knee all the way up into the groin. Gentlemen – ensure your well secured… you will understand what I am saying.