I´m almost 47 now & noticed--like a light switch--that my body is changing! I gained 10lbs out of nowhere (over these winter months). And, this is the strange one, I can´t handle alcohol anymore. Two craft beers knock me on my butt! (Recently, I actually fell down a couple stairs in my house after two beers.)
I can still run (even with the extra weight) without injury. (I am now 6ft, 170 lbs.) But, I´m probably running 35+ miles a week. I pretty much stopped drinking. I´m trying to eat cleaner too, including taking salads for lunch now.
But, can anyone give me some insight into your aging?