Shin splints

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I am having problems with shin splints. When I went to fire school oh so many years ago now I had to run up a hill 3/4 of a mile and then back down. AThe up hill didnt bother me but the down hill has made it now painful to run anytime. I would like to do a little running and am looking for any info that may help relieve the pain.Any help is very welcome. Thanks.