I am an AKC agility judge and am on my feet about 10 hours per day when judging. I walk and occasionally run about 10 miles per day while judging. I used to take Alieve to help ease the discomfort in my back and legs. Since I started wearing the Z-Coils, no pain medication is needed. I love these shoes. In the last 2 weeks of judging, I have had about 10 different people try my shoes on and loved them. I got tired of everyone asking where I got them, so I posted the website for all to see. These are the best shoes for anyone on their feet all day long!