I'm not a D runner(Mainly S to M, no pun intended), but I recently began suffering from shin splints. I always brushed them off, but these recent ones were of a kind I was not used to. Anyway, on my comute to school in the subway, I did toe raises. Basically, I stood up on the train and flexed my body upwards, so in a swift motion, I would be on my toes. I would feel all my weight on my toes and feel stress on my shins. This built up the muscles around the bone in my shin, which is where the pain was. My team captain said that the shin splints I was having were caused by tiny tears in the calf muscle surrounding the bone in my shin. After about 2 weeks, the shin splints were relieved, and after 3-4 weeks, were gone.