You can do this protocol using a neutral, wide, or underhand grip. I like to use a different grip each time to create a different stimulus. The isometric is performed at the bottom position because this is the point of the ROM where most people cheat.
Okay Spunky, go to the mirror and take a peek at your backside. Careful, chances are the view back there is a mess. Chances are you ain't got no meat back there. That's right, no muscle, or very little.