I am a beginner at running and rather large at 17 Stone. When I first started Running my shins and knees hurt badly. A kind runner suggested that I change my running shoes. This was excellent and did the trick, all the pains seemed to stop like magic. My problem is that after spending £100 on shoes they wore down in 3 months and the more they wore the more pains came back. Surely there must be an alternative to spending £100 on shoes every 3 months.