I work 12+ hours/day 3-4 times a week... so, occasional lower back and knee pain are frequent(also had a recent bilat knee injury)... I bought these Shape ups after hearing great reviews from co-workers and reading reviews through this website... On the first night I wore it at work, the new shoes felt weird during the first couple of hours (I couldn't help thinking I would fall backwards,lol), and I didn't realize I had the tendency to "drag my feet" half way into my work shift... so, my point is: Sketchers Shape ups helps you steady your gait, propels you to take a real step and it reduces the impact on your knees and lower back...so, you are not as sore at the end of your day. I already ditched my white Danko's... the shape ups are a great invention for your foot/back/knee care... I will buy one in white also! Highly recommend it.