I was so excited to get these shoes for Christmas.  I wore them during my regular walking routine (3 miles/5 days/week).  After the first week, my back felt like it had a pinched nerve - alot of pain.  My chiropractor made an adjustment and I was better in a couple of days.  Put the shoes back on, walked, started my daily routine with shoes on.  I noticed my pain was coming back - I took the shoes off - back pain subsided in couple of hours.  I have not put the shoes back on and I have not had anymore back pain since going about regular and exercise routine with my regular walking shoes.  I also noticed if wore the EasyTones for extended time in the day my toes would get numb.