I can't stand for any length of time without my toes going numb on my left foot with mine. When I was trying to be healthier, lose a little weight a couple of years ago I was going to a gym 3 to 4 days a week. Whenever I tried to ride one of those seated exercise bikes I would have to stop every little bit & take my shoes off and message my feet to get feeling back in them. Legs have hurt me so bad this year that walking is way more difficult. It feels like I have lead in them & they burn like crazy. My butt cheeks go numb when I sit for any length of time. I can't bend over for more than a couple minutes without being in excruciating pain. With each passing year it gets worse, very frustrating.