In my early 20s, I got tinnitus even though in the rare occasion I’m around loud noises I wear hearing protection.
In my mid-late 20s, my vision got worse after never needing glasses and my knees starting creaking with occasional pain. I now need some more involved dental work even though I brush and floss regularly.
I’ve lived a predominantly outdoor, active lifestyle the last several years, so I should be quite well off health-wise, but it still feels like I’m aging faster than I should be. wtf?
You’re just starting to get old enough that your body doesn’t deal with abuse and lack of nutrition/fitness as well. People do underestimate their activity level, especially if they’re use to most people around them having no activity. When you hit the work force a lot of people find themselves sitting at a desk most of the time and no longer walking around campus all the time. Also you might find yourself eating out more either because you can afford it or because you don’t feel like cooking. Not a great combo.
Any activity is good but to recover from the activity to be healthier for it you need proper nutrition and rest too. I would also say that different activities can benefit different things and just being outside might not actually do much, depending on what you’re doing. For the knee issues that could be related to activity or missing pre-hab.
Another poster mentioned genetics which is something to consider. Although if you drink sugary/acidic drinks that could be related to the dental issues.