My leg problems occur in my quadriceps. They feel as if they can't support me. I can't feel them contract when I am wlaking up or down steep hills or riding a bike uphill. A couple of weeks ago I went on a long bike ride with my kids. I couldn't ride up some of the hills because my quads gave me no power. Then we got home and I about fell dwon the steps because my quads turned to jello and would not support me.