I think you are really wrong here. I’m 47 and after on and off running for decades, a few months ago I started to run every day. 2K in the first month - to start gently, then 2M (3.22k) for a month, then the next month 5k, and then 8k. I am doing 10k every day after 5 months, and I've never felt before so fit and healthy. I think it’s never too late to start exercising regularly, even if it means daily.