Using isometric holds against a wall or with maximal weight can improve technique and force application in specific movements.

“if let's say that you're trying to learn to throw a front kick and you're doing it, you're all over the place but if you place your foot on a wall and if your coach or Sensei positions your body your foot in a certain way and teaches you to start to start applying pressure to that wall and the ground at the same time... The same thing let's say that you're trying to optimize your position for the bottom of the deadlift so you load up more weight that you could possibly lift and then you wedge yourself under and you start applying pressure”