Because my spine is twisted to the left from a trampoline accident years ago, my right side over compensates and is sore all the time. Many times, my back would go out and it was very painful. I'm only 33 years old. Since wearing my Sketcher Shape-Ups, I have had no lower back pain. They really help to align my spine and give me a better posture. I would recommend these shoes to everyone. I think I'll try the flip flops, come summer.