We all shift around our priorities with age. For me, it’s not about being “ripped and shirtless” all the time, but the fact that just about every disease and malady can be predicted by waist circumference (belly button) measurement. Go over a certain point and you’re going to die early from something that could have been avoided. Thems the facts, sadly.
Now, did I give a shit about that at 30? Nope. But I certainly do at 51.
Anyway, here’s an article I did about the waist thing. This particular standard is VERY strict, but the experts/researchers I was writing about are probably on the right track.