When you run, the shock wave generated by each impact with the ground corresponds to approximately 3 times your weight. This wave runs from the heel to the top of the spinal column. Your joints act as shock absorbers, but this puts a lot of pressure on them. We designed the DECATHLON RUN ACTIVE running shoes to protect you from shocks and impact. | Kalenji Women's Active, Jogging Shoes in Light Gray, Size 5