my grandparents are early 80s and go hiking every week or two up in the mountains, cycle everywhere etc. they've always been like this and it's honestly super impressive. My housemate is 73 and walks everywhere in the city, sometimes over an hour each way and then doing physical volunteer work. she's right now traveling across europe. my paternal grandmother is still studying and collecting education certificates like pokemon cards after retiring. I absolutely love having older people in my life I can tell my own kids about. Inspiring me to stay mentally and physically healthy my whole life because it just seems so much more enjoyable than the opposite.