The Kitten, as you might have guessed, is inspired by that poster of a kitten "hanging there". The thing is, when it comes to developing fascial fitness, ab strength and upper body muscle density, fighting gravity is a pretty good form of exercise. Hanging tough not only strengthens muscles and tendons but also helps us develop fascial fitness throughout the body. Not bad for a 'kitten' workout.
Extra Credit: 1 minute rest between sets.