I can't believe how much ZCoil shoes have turned my life around. I struggled to walk 5 kms with normal sports shoes because I suffered with severe shin splints along with osteo arthritis in my back and hips. I would moan and complain the whole time. I can now walk/jog 6km in 45mins (I'm 51 and not fit) and I have no pain. My walking partner can't believe I don't complain at all now! I do have good pain afterwards from working my muscles but that's all. I bought the sandle style first and after realising how amazing they were after about 2 months I was back for the Freedom trainers. I cannot recommend Springy Feet shoes more highly. They've given me back my Freedom literally, when it comes to exercise.