So whats a shin splint? According to wikipedia -
Shin splints or medial tibial stress syndrome (MTSS) refers to pain along or just behind the tibia (shinbone), the large bone in the front of the lower leg. Shin splints occur during physical activity and result from too much force on the shinbone and connective tissue attaching muscles to it. Shin splints are common in runners and in those who participate in activities with sudden stops and starts, such as football, basketball, soccer, tennis and marching band, along with sports that apply extreme pressure to the legs, such as gymnastics. Ten to fifteen percent of running injuries are shin splints.
Probably nothing. I have a training program to attend to.