Running does not wear your Knees out.
I keep reading this. I’m unsure where this dodgy information has come from but it seems to be in ground in some people. From what I have read around the subject running can actually strengthen the Cartilage so in fact doing the opposite to your knee joints. Excess weight can put extra pressure on your knees but as one of the best way to burn calories is to run so in the long term the running would be better for you. Of course if you already have knee problems running could make it worse but as the cause of knee problems the majority of the Science is against that idea. An interesting article from Runner’s world if your interested.
Those regular readers will know I used to be a Cyclist and am hoping to get back into it next year. In my personal experience a lot more cyclists have knee problems (normally from poorly set up clipless pedals) than runners. No science behind that just personal observation,