Relaxing? Who said anything about relaxing? Hahahahaha! I'm 54 and still play like I'm in my 20-30's, just a lot better at it now.
Most of my friends are younger because friends my age have so many excuses they tell themselves why they can't do this or that anymore. Make excuses or make it happen. You can't do both.
yes we all make our choices, and our excuses. My wife and I still go and do a lot of things, but we are mostly homebodies, and while I think it would be nice to visit and immerse in other countries and cultures, I just don't like to travel much. I am a great armchair traveler though. Even at the age we are approaching and being retired we have moved a few times, we will one day find where we want to be and restart a garden. Until then it is explore what we can close to home.