Thanks for your quick reply Lisa. I don't think it's my shoes as I went to the New Balance store and bought the best walking shoes they have and I bought special insoles for flat feet. These cramps are pretty random I can't think of anything that I do that would be the cause. Funny thing is I had a total knee replacement on June 25th.2018 and I was dreading getting cramps while it would have been so hard to get out of bed to stretch or walk it off and for whatever reason I did not get any for about 8 weeks post-op.?????