Runners seem to get injuries. And often the pain doesn't start till sometime after a run. Anyone any wisdom about pre-empting injury? For context have just done w9r1 and have niggly back pain and back of left knee stiffness. No big deal but I really want to stay serious-injury-free if it's within my power! Particularly as I want to keep running till I'm in my eighties (currently 66) 😀 . Thanks in advance oh wise and wonderful forum!