When I told my GP that I had started the C25K program, he warned me that running was very bad for the knees and that I should consider something less harmful like swimming. I am on W2R2 at the moment and do not intend to stop, but because of what he said, I have a nagging little voice inside my head that keeps telling me my knees will be shot by the time I'm 40 (I'm only 28 at the mo). Is what he said true? Any advice/ thoughts?
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