I always thought baseball cleats would be great for aerating a lawn. You'd get in a pretty good leg workout, plus, you'd be servicing your lawn for future growth, so it's a win-win!
They could be really good for hiking difficult or slippery terrain. Really, cleats are fairly useful if you have many purposes for them. It'd be easy to re-purpose them for a myriad of things like lawn aeration to hiking to even playing another sport, like soccer! Unless there's something I don't know about needing completely different shoes for that.
Spiky for lawn aeration, too?
Baseball cleats in action!
“It'd be easy to re-purpose them for a myraid of things.”