It depends on how much you have.
The excessive<span> force causes the muscles to swell and</span>increases<span> the pressure against the bone, leading to pain and inflammation. Shin splints can also result from stress reactions to bone fractures. The </span>constant<span> pounding can cause minute cracks in the bones of the leg. ouch</span>
I think that by adding 20 minutes to each run the intensity will be increased.
