Hi Lisa - Thanks for asking about my MS. The short answer is I don't now how it is lately! Late last summer I had a total right knee replacement and have had a very hard time recovering. For the first 6 months I assumed (probably correctly) that I was healing on schedule but with more pain in the actual knee than most people experience. As time goes on, though, I notice both legs sometimes feel like cement. Very very heavy, both knees painful the R due to nagging post-op pain and the L hurting because there is no more cartilage left. The L one will need to be done probably later this year. I just don't know if the weight in my legs is due to MS or something else. Time to call my neurologist I guess!