Not an expert, but I used to religiously and obsessively play the niche sport of Gaelic/American handball, specifically the 4-wall variation.
It’s essentially racquetball, but with a much smaller, much harder ball, played only with gloved hands (gloves do not pad hands, just used to keep the ball dry).
Technically the 1-wall variation might have been the first ball sport to ever exist and is certainly the predecessor to modern tennis.
Awesome game, insane workout, and one of the few sports that is truly ambidextrous (handball absolutely requires use of both hands/arms).
I had to step away when I got into the tech sector and needed to dedicate most of my time to studying and working, but I played like it was a job for 8 years. Loved it.
I live with my elderly parents in a community of mostly retired folks. I’m in my early 40s. Just where I ended up.
I was very active during my mid 20s through my 30s. Fell off the wagon in my late 30s and then had a scare of very high blood pressure one doctor visit. Got back on a better diet/exercise and now am back to normal BP.
Seeing all the elderly people in my area is a stark reminder of what not being active over your lifetime can do to you. All our bodies degrade over time, but not equally. Many of them are in constant pain and frustration over their bodies simply not doing basic things like picking stuff off the floor or lifting relatively light objects (I’m talking less than 5 lbs).
Try and find activities that keeps your body moving and your mind active. It’s just a better life if you pay the physical/mental exercise tax up front rather than try play catch up later. Even better if you can make it a social activity.
Don’t get me wrong, it’s not a panacea. Shit can still happen, but moving your body and keeping your mind engaged in the world is imho an essential component to living a fulfilled and engaging life.