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.

Nearly all available evidence points the other way, sorry. Now, intense sports (like hockey) isn't as good as exercise where you don't put yourself in physical collisions and major strains is better, but both are better then sedentary lifestyles.

I'd recommend a better doctor. My dad was active and sporty well into his late 70s and lived until he was 94.