i have a mile and a half run coming up, most likely two of them. i went running this morning and had to stop about 1/2 a mile into it because of the pain in my legs. i have never had "shin splints" before, so i'm not really sure that what it is, but i do not know what else it could be. i have changed nothing to my diet or supplement intake lately, but i have added more calf training to my routine, 3 times a week total. is that what it could be? i am really hoping it is. i am going to knock off training legs entirely until this/these runs are over with (2 to 3 weeks). my question is, if this is not what is causing the pain (over training calves) then is there something (supplement) that can help me out. this might just be a small part of getting older, but DAM! HELP i need to do these runs.......