Do you know what a battle rope is?

So, I’m shopping in a store, and there’s this box with a huge rope spilling out of it, and the box reads “U.S. Army 40 Foot Battle Rope”. It’s a thick 40-foot rope with rubberized ends, and apparently you hold one end of this giant rope in each hand, and then… do something that results in legion health benefits.

I’d never heard of this, and even after a bit of (but not enough) Googling, I still don’t know what you’re supposed to do with it.

I want it to be that you brandish it and do battle with it, and can wield it for self-defense.

I find the whole thing rather hilarious.

Did you know this existed? Do you know what one is supposed to do with a battle rope? In what sense is the word “battle” appropriate?