active male who's now 51; I disagree a bit about it "sneaking up" - at least for me. I noticed a massive decline in just a year or two, where I started commenting "I feel old" a lot more.
The delta isn't so different, but there are lots of things where I feel an inflection from "improving" to "flat or declining" and that is extremely noticeable. To me that's what aging is, and it happens FAST.
The delta isn't so different, but there are lots of things where I feel an inflection from "improving" to "flat or declining" and that is extremely noticeable. To me that's what aging is, and it happens FAST.