If you're young(er) and exercising, enjoy it.
No, seriously. Because I'm not old, but I'm not super young anymore and exercising is trickier.
Things hurt a lot easier. Get hurt a lot easier. Take longer to feel better, tweak and twinge at the smallest of provocations.
That time you slammed your foot into the shopping cart two summers ago means you can't run without pain. Sometimes can't walk without pain, and I know these things happen to young(er) people too but more and more I hear my friends and I recovering from injuries that didn't used to happen.
C-Dawg keeps popping her rib out. Doesn't know if it's the weeding that did it, or the running, or just sleeping on it weird.
Because, yeah, all of a sudden you can sleep weird and be in pain the next day, next week it's ridiculous.
So if you're younger and you feel stiff and sore but you've got no aches and pains or popped ribs or broken toe fragments or tweaked backs or S.I. injuries, frigging enjoy that.
Trust me, enjoy being able to throw yourself about with abandon.
Oh, and drink more water.
It won't do anything but good.