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The original was posted on /r/explainlikeimfive by /u/jabronismacker on 2023-09-11 14:05:38.
I’m in my 30s. I eat right, exercise, hydrate, and live a healthy lifestyle for the most part. I’ll wake up with random pains in my body that usually go away after days and meds. Getting cramps or stiffness in areas while doing nothing. Back injury? Forget it that’s weeks of physical therapy at least. In my 20s I could take an Advil and it’ll be gone in a couple hours. What gives? I can understand later in life when your body focuses on maintaining your systems. But ~27 you still got 60-70 years left but your body already mails it in. Just tells you to live with it. I know it can’t be just me getting random injuries that inexplicably last a long time around this age.
Glycation, hyper-inflammation and mechanical distortion. It’s not exactly that you lose the ability to recover, your body simply patches injuries pretty effectively, which reqvires lots of mechanisms that we have evolved. Since the evolutionarily critical years are the teenage-early adulthood (little lost effort in childhood, little reproductive benefit later), those patching mechanisms are hyper-optimized for that time frame.
