NOT intelligent design. Not even close. You want to know what's intelligent design? A nuclear power plant. Something in which, if the temperature is getting too high, an alarm goes off that signals the operator that "the temperature is too high". Or a car. Which has a light on the dash that says "pull over immediately if you don't want a BIG problem".
But my body? It let me, without raising a single peep or warning, extend the duration and extent of the normal exercises that I do. You see, I decided to modify my suspended (TRX) pushups and make them into super slow pushups with planks at the top and bottom. Harder. Hence better, right? Did a bunch of them. Felt just fine.
Some while later I got on the rowing machine and after two minutes a muscle in my back went "ping". Or perhaps "ouch!".
I rowed a few more strokes, lightly. Did the "ouch" go away? No, it did not. So I stopped rowing (yay for me not being even stupider and continuing). But did my body warn me, way back an hour earlier? Something along the lines of "Attention, this is your body speaking. What you're doing is stressing your back muscles. Back off if you don't want a BIG problem."
Did my body say that to me? It did not.
Is that an intelligent design? Nooooo way.