Hmmmm not sure what I am going to do now - I tt my husband about it and he said that concrete is probably not the culprit because I run on concrete outdoors constantly - I probably need crosstrainer shoes instead of running shoes for step aerobic so I don't twist my ankles. . . . I have a rug down for my weights, but I felt like I was getting stuck on the rug when I did step on it.......
Maybe I will try the shoes first and then try the puzzle mats - - will post in open discussion if I notice a difference.....
My hubby said only if I were working out bare foot, would the concrete really bother my joints - - otherwise think about volleyball, tennis, and basketball where the surface is hard - but I think even those surfaces have some give??