Best wishes ! Don’t forget to make the most of life and tick a few things off the todo list. 40 to me felt little different to my early 30’s physically, 53 now amd certaintly this is different to my early 40’s
FWIW only took up mtb-ing in my early 40’s so definitely second the “try new things”
I’m healthy
I ride
I do yoga
I ski
I love the outdoors
I enjoy life
I have a top bird
I am gradually edging year by year to become a ski instructor
I’m happy.
As for 40 getting to be ‘old’ my answer to that is ‘bollocks’. Embrace it…heres thet cliched crap….enjoy it, there’s plenty in the grave yard that would swap you! You’re only here once, don’t waste it!