Running shoes are often blamed when a runner develops foot or leg pain. Maybe the shoes feel different than they used to. Maybe a new pair seems to cause blisters. Or perhaps someone has told you that your flat feet, high arches, or running style means you need a specific type of shoe. But the relationship between running shoes and injury is more complicated than that. Research suggests that running injuries have many possible causes, and there is not strong evidence that one

SPS is an autoimmune disorder where the body's "brake" system fails, causing severe muscle stiffness, spasms, and heightened sensitivity.