Paula Radcliffe as been to the very top in her running career, but she has now entered a different world where, like many others, she is trying to fit in some running in between looking after two children and other domestic pressures. In her article in the Daily Telegraph, she makes her suggestions as to how to enjoy mid life running.
https://www.telegraph.co.uk/health-fitness/body/paula-radcliffe-better-runner-40s/